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Invisible giant sits wherever he wants. (i.imgur.com)

submitted ago by Probably_Fat

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[–]lincolnsbeer 1010 points1011 points ago

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Explanation of what happend (from other thread):

To prevent mixing/contamination of the fluids beings transported tankers are thoroughly steam cleaned after being used.

Physics 101, if you heat a gas it expands, if you cool a gas it contracts. Heating a gas in a confined spaces creates pressure while cooling a gas in a confined space creates a vacuum. The problem was that these cleaning crews would go steam clean the tanker during the day and seal it up to prevent any contamination. But when the temperature dropped during the night the steam would cool and create a vacuum.

Normally the vacuum would be pretty weak and would only result in a hatch refusing to open. Fun fact, a 12 inch diameter hatch under a 5 psi vacuum would require over 550 lbs of force to open. In rare situations the walls of the tanker would bow in a bit. What you see in this video is the MOST extreme situation. To achieve results like this you have to be trying to implode the tanker.

Edit: Additionally there are a lot of people that don't know how pressure works. My friends dad lost some guys at work because they opened a hatch that was about the size of a door which was under 3 psi of pressure. It was something like 10,000 lbs of force when you did the math. The hatch blew open, killing the two guys in front of it and was found almost a quarter mile away.

[–]NaljunForgotPassword 126 points127 points ago

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what were they doing that involved a pressured door?

[–]SaintHypno 80 points81 points ago

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Possibly a boiler in a power plant. My dad has worked at one for 31 years and people have died during similar incidents.

[–]Marauder 54 points55 points ago

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When I hear 'pressured door' I can't help but think of the Byford Dolphin accident. http://en.wikipedia.org/wiki/Byford_Dolphin

[–]blubloblu 33 points34 points ago

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Subsequent investigation by forensic pathologists determined D4, being exposed to the highest pressure gradient, violently exploded due to the rapid and massive expansion of internal gases. All of his thoracic and abdominal organs, and even his thoracic spine were ejected, as were all of his limbs. Simultaneously, his remains were expelled through the narrow trunk opening left by the jammed chamber door, less than 60 centimetres (24 in) in diameter. Fragments of his body were found scattered about the rig.

Wow.

[–]whisk3rs 12 points13 points ago

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His death was most likely instantaneous and painless.

Well, in that case that's how I want to go when my time comes.

[–]Dubzophrenia 14 points15 points ago

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I've always wanted to die in a way that was so out-of-the-ordinary that everyone would know about.

This is how I want to die.

[–]railmaniac 32 points33 points ago

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I want to die in orgasmic bliss, in the throes of pleasure and passion like my great uncle - not screaming in terror like his passengers.

[–]booknutdc 1 point2 points ago

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Why would anyone downvote this touching and romantic tale?

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    [–]netraven5000 1 point2 points ago

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    I want death by snu snu.

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        [–]Kilsimiv 3 points4 points ago

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        whoa.

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          [–]LOLasaurusFTW 45 points46 points ago

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          I was the one that wrote the original post in the other thread.

          The door was to a testing chamber where companies could pressure test equipment for an inspector. Oil companies don't like getting faulty equipment so its not uncommon for them to send an inspector to inspect parts to make sure they're working properly before shipping them to the oil rig.

          My buddys dad was one of these inspectors and that day they were testing a large valve that had been repaired. They guys operating the chamber thought they had depressurized the unit but there was still some pressure left. At first the latch wouldn't budge, so they got a large wrench and smacked the latch until it gave. The door which was pretty damn thick blew open and torn itself off the hinges, killing the two guys that beat it open.

          [–]pandalust 17 points18 points ago

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          Honestly, if I was working with pressurized environments or vacuums I would take a latch not opening or a door not opening as a very very serious situation. Did they not have protocols for this happening?

          [–][deleted] 17 points18 points ago

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          They do have protocols for this. If a hatch doesn't open on a pressurized vessel for any reason the crew will stop and triple check (the double check has already happened) to make sure that any positive or negative pressure has been relieved. Any injury to the crew for this is because of their own error or not following protocol.

          Source: I work at a chemical plant with a lot of pressure vessels.

          [–]pandalust 14 points15 points ago

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          Hypothetically if the vessel is found to have a pressure which for whatever reason can't be released through the valves, what do you do then? drill a hole? small explosives?

          [–]burburburbur 16 points17 points ago

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          You would NOT want to drill a hole in a pressurized pressure vessel. Once you compromise one point sufficiently it will explode. You can't just drill a hole and let it vent. Think of a balloon when you pop it with a pin, only the balloon is thick steel and under thousands of times more pressure in some cases.

          Normally these things have pressure relief valves that are designed to open at set pressures (springs hold them closed until pressure is high enough to force the spring to compress opening a valve).

          If somehow all the valves failed and stuck shut your only real hope is to shut down the pressurizing source and slowly vent it from that line.

          If you had some hypothetical chamber with no inlets or outlets, all you can do is bury most of it and blow it up. From far away.

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            [–]NightOfTheHunter 5 points6 points ago*

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            I was a loader at a chemical plant. The loader is a crew of one, and a tank of this size takes more than one shift to load or offload; you can absolutely inherit a huge problem. Before any pressurized product can move in or out of the tank, two lines have to be connected, one liquid, one vapor. We dealt with high-ends gases, so each system had to be closed. (No such thing as opening a hatch, no contact with atmosphere.) This vessel has only one line connected and the tank isn't on the tracks. I don't believe it was accidental. I don't know nothin' about no protocol. Our operators had work ethics similar to Homer Simpson. I usually had to wake up the guy I was relieving. We never lost an operator while I was there, although I saw several outside contractors killed. I worked at one of the largest refineries in the country.

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                [–]toxiklogic 152 points153 points ago

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                Cooking meth in the basement of an industrial laundromat.

                [–]Barackobilbo 52 points53 points ago

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                He mad

                [–]1449320 2 points3 points ago

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                yes he is

                [–]MrMcHaggis 7 points8 points ago

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                Ding!

                [–][deleted] ago

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                [deleted]

                [–]cdtoad 1 point2 points ago

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                Strict adherence to pretty much any safety regulations will prevent pretty much any bad shit from happening.

                [–][deleted] 1 point2 points ago

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                If this was in the basement, I doubt the door blew a quarter of a mile away...

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                  [–]reagan2016 82 points83 points ago

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                  A large pressure cooker at a chicken restaurant.

                  [–]dzudz 156 points157 points ago

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                  They died serving their country.

                  [–]tardisrider613 18 points19 points ago

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                  I'm sure Colonel Sanders sent the family a touching letter.

                  [–]KingMotion 34 points35 points ago

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                  I say you he dead.

                  [–]BarryPepito 5 points6 points ago

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                  and chicken wings

                  [–]ryandaily 6 points7 points ago

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                  I think a vigil is in order.

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                    [–]Pineapple-Houses 1 point2 points ago

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                    Could have been an Autoclave, which is essentially a giant pressure cooker. They're used in curing composite structures.

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                      [–]GrandMasterC 6 points7 points ago

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                      I use one almost everyday. An autoclave. I cured some polyamide material one time that required us to pressurize the vessel (which is ~8ft around and ~20ft long) up to 200psi and heated to 600degF. That's some crazy stuff, Polyamide resin systems.

                      [–]Jimmy8085 2 points3 points ago

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                      We have 9 industrial freeze driers where I work, they hit close to negative 1bar and are the size of a small room. The idea of one of those failing terrifies me.

                      [–]DreadedSeriousDog 2 points3 points ago

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                      I worked with high pressure freezing of yeast cultures as a preparation for the transmission electron microscope. The HPF machine is one of the scariest things i've seen in a lab. It creates a pressure of 2100 bar (30457 psi) and looks like it was built by Blaise Pascal himself. It makes very loud and uncomfortable noises like it is going to burst into pieces any given second. In another lab they forgot the safeguard before turning it on, they accidently shot a solid metal rod in a multi-level building through several floors until it shot out of the roof but luckily without killing anyone. But my boss told me if you would put that machine outside, you could easily shoot small airplanes with it.

                      [–]epicGOPfail 3 points4 points ago

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                      so i'm tagging you as "GrandMasterC=makes nylons" gotcha

                      [–]GrandMasterC 3 points4 points ago

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                      Haha. I'm busted. Epic spelling failure. I should have said "polyimide" resins. Here's a link to some info on the stuff. http://www.compositesworld.com/articles/resins-for-the-hot-zone-part-i-polyimides

                      [–]epicGOPfail 4 points5 points ago

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                      i know all about polyimides :)

                      you're probably driving off the water in that autoclave with the vacuum feed as you cyclize the precursor from the polyamic acid into the fully imidized product.

                      if it helps, that's way sexier than nylons/polyamides/polypeptides.

                      you can use that to sweep the chicks off their feet :)

                      [–]GrandMasterC 5 points6 points ago

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                      What applications have you used those materials? I was making an experimental turned exhaust cowling for a helicopter, which is why we needed the higher service temp material. When I signed on to that project, I researched what Renegade had done to remove the deadly components of that resin, but I was still fairly cautious of it.

                      [–]epicGOPfail 1 point2 points ago

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                      back in the '80s (yes, '80s) polyimides were developed largely for the semiconductor industry. PI have great thermal properties, but are not very soluble or easy to functionalize. Those issues make them a bitch to adhere to, and in the VLSI app's, adhesion is critical.

                      So, there we were developing complicated cure schedules and even more complicated coupling agents and even MORE complicated diamines and dianhydrides. Some even gave water soluble polymers... ah, the visionary Corporate Americana that killed it all.

                      On the bright side the likes of HP and 3M were able to advance flexible circuitry a few years later using polyimide as substrate. You still see that on the inkjet print heads.

                      [–]CarbonGod 1 point2 points ago

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                      polypeptide resins? I've heard of the research into using peptides, but didn't know they are in use. Why are you grouping them with nylons btw?

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                        [–]Enginerdiest 44 points45 points ago

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                        10000lbs/3psi = 3,333 in2 = 2.15m2

                        Average door: ~1mx2m = 2m2

                        Yup, checks out.

                        [–]thefirebuilds 1 point2 points ago

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                        To science! (I'm trusting your math because I just killed a bottle of Barbados rum. )

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                          [–]OompaOrangeFace 32 points33 points ago

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                          I remember reading a description of this exact test where they said they were showing what happens if you don't vent the tank when pumping the contents from it.

                          [–]T-RexInAnF-14 9 points10 points ago

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                          for the love of Pete everybody upvote this comment. this railcar was imploded as a demonstration, which is why people are laughing in the background.

                          [–]OompaOrangeFace 4 points5 points ago

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                          Gifs with sound!

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                            [–]MrFrankly 13 points14 points ago*

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                            The hatch blew open, killing the two guys in front of it and was found almost a quarter mile away.

                            Reminds me of this accident: http://en.wikipedia.org/wiki/Byford_Dolphin#Diving_bell_accident

                            On 5 November 1983 at 4:00 a.m., while drilling in the Frigg gas field in the Norwegian sector of the North Sea, four divers were in a decompression chamber system attached by a trunk (a short passage) to a diving bell on the rig, being assisted by two dive tenders.[5] One diver was about to close the door between the chamber system and the trunk when the chamber explosively decompressed from a pressure of nine atmospheres to one atmosphere in a fraction of a second. Five of the men were killed instantly; the other was severely injured.

                            [–]dictionthief 3 points4 points ago

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                            Wow the forensic description of the aftermath was... Very detailed...

                            [–]unfortunatejordan 1 point2 points ago

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                            Seriously, poor diver D4, at least they ended that part with this:

                            His death was most likely instantaneous and painless.

                            [–]Arlieth 1 point2 points ago

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                            Reading that description was like something out of Dead Space.

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                              [–]Canadian_Infidel 6 points7 points ago

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                              I've read that somebody pumped the tanker down without opening the vents. I've also heard of that happening in real life.

                              [–]skapkin 11 points12 points ago

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                              This can be the work of only one person...Magneto

                              [–]punknoflowers 30 points31 points ago

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                              Someone who is unfamiliar with pressure units here.

                              The lower the psi value, the stronger the force of the vacuum?

                              [–]bonafidebob 140 points141 points ago

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                              PSI is Pounds per Square Inch. Good old imperial units... but the thing to know is right there in the unit: "per square inch."

                              The bigger the area of the door, the more force on it. A 10 inch by 10 inch door will be 100 square inches, and so at 3psi that's 300lbs. A "man sized" 3 foot by 5 foot door (36 x 60 inches) will be 2160 square inches, and at 3 psi that's 6480 lbs.

                              [–]punknoflowers 24 points25 points ago

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                              Excellent answer, thank you.

                              [–]Serai 16 points17 points ago

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                              Good answer. Also, I still read lobsters when I see lbs.

                              [–]Atersed 51 points52 points ago

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                              Godammit, why don't people just use Pascals.

                              [–]bonafidebob 35 points36 points ago

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                              'cause what's a Newton? and aren't meters for pressure usually round?

                              [–]i_dontgetit 15 points16 points ago

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                              A delicious cookie.

                              [–]jahpo 9 points10 points ago

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                              It's Fruit and Cake

                              [–]red_lantern 4 points5 points ago

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                              It's not a cookie, mother, it's fruit and cake.

                              [–]i_dontgetit 1 point2 points ago

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                              So it's like a fruit cookie?

                              [–]Atersed 36 points37 points ago

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                              A Newton is a measure of force. Approximately it's the force acting on a 100 gram mass, but technically its the force required to accelerate one kilogram of mass at one metre per second per second. The nice thing about SI units is they're all defined using other SI units so they all fit together.

                              /SI crusade

                              I don't get why Pascal meter can't also be round

                              [–]bonafidebob 38 points39 points ago

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                              Um... Pascals are Newtons per square meter. Square. Meter. I was making a joke.

                              [–]pkbooo 25 points26 points ago

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                              Speaking of Newton/Pascal jokes...

                              Einstein, Pascal, and Newton are playing hide and go seek. Einstein is counting while Newton and Pascal hide. Pascal runs off and hides while Newton doesn’t move an inch. Instead, he draws a square around himself in the dirt. After Einstein finishes counting, he opens his eyes and says, “Found you Newton! That was easy.”

                              Newton says, “No you didn’t. You found Pascal.” He points down to the square in the dirt. “One Newton per meter squared.”

                              [–]bonafidebob 8 points9 points ago

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                              Then who ran off and hid??!!!?

                              [–]Agent-A 1 point2 points ago

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                              Would you mind explaining this like I'm 5?

                              [–]Lazy_I 1 point2 points ago

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                              A newton (unit) per meter squared is a pascal (different unit). Newton is standing in a square meter. Pascal.

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                                [–]Atersed 29 points30 points ago

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                                Shit.

                                [–]bonafidebob 15 points16 points ago

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                                Yeah, I'm not so good at science jokes...

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                                    [–]xiian 1 point2 points ago

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                                    Fruited cake.

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                                      [–]KalAl 1 point2 points ago

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                                      What's the difference in this situation? You're not doing unit conversion here, just trying to visualize a certain amount of force. Both units are force-over-area and equally useful for that purpose.

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                                        [–]Funk86 5 points6 points ago

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                                        So would a spacecraft's airlock door have some 30,000 pounds of force acting on it when the ship is in space?

                                        No wonder people get blown out.

                                        [–]bonafidebob 8 points9 points ago

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                                        I doubt the internal pressure would be a full 1 atmosphere, humans don't need so much pressure to survive. But, yeah, with a vacuum outside the spaceship walls and doors have to hold it all in. Commercial flights too, there's significant cabin pressure compared to outside air at 30000 feet up.

                                        [–]gwot 5 points6 points ago

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                                        But really at maximum there is a delta-P of roughly one atmosphere. Outside pressure approaches a vacuum whilst the inside is roughly atmospheric.

                                        [–]bonafidebob 3 points4 points ago

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                                        I looked it up and you're right, the ISS is at about sea level pressure.

                                        [–]LarrySDonald 3 points4 points ago

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                                        Hard to say. A standard jetliner used to keep a little below .5 atm. According to wikipedia they're changing it to more .83 atm now, but that's still a lot less than one and that's for passenger aircraft (I'm assuming military or spaceflight with accordingly "in good health" people can swing less). I mostly remember being told about it because of diving. Going to .5 atm is good and well if you didn't pre-load by chilling at 3 atm until your blood was full of nitrogen first, so there are some additional concerns if diving until you're maxed out and then suddenly getting on a plane.

                                        [–]mololith_obelisk 1 point2 points ago

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                                        for diving it is 1 additional atmosphere of pressure for every 10 meters of depth. being on an aircraft at 0.5 and experiencing rapid decompression to 1 atm is the same as diving 10 m deep and rapidly surfacing.

                                        unlicensed divers are limited to less than 20 meters depth for this reason.

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                                          [–]CCalms 5 points6 points ago

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                                          the purpose of an airlock to to get rid of that pressure when opening doors by changing the pressure of the chamber gradually

                                          [–]Funk86 10 points11 points ago

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                                          Well, assuming the chamber between the inner and outer door is pressurized to 14psi, then wouldn't the outer door have the 30,000lbs from the air pressed against it?

                                          Makes The Professor's statement of "Well, it's a spaceship, so it can handle anywhere between zero and one atmospheres" more significant.

                                          [–]Thimm 3 points4 points ago

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                                          I always thought that was an extra joke for anyone who was aware of these facts.

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                                              [–]shaolin_monk 20 points21 points ago

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                                              I think it's worth pointing out that 3 psi (3 pounds per square inch) is in this case a measure of gauge pressure. Gauge pressure is zero referenced against the ambient air pressure, or atmospheric pressure. Atmospheric pressure is generally accepted to be 101.3 kPa (kilo Pascals) or 1.0 atm (atmospheres) or (14.7 psi) on Earth.

                                              The absolute pressure inside the room (0 absolute pressure would be a perfect vacuum) would be ~ 17.7psi, and the absolute pressure outside would be ~ 14.7psi. This difference in pressure would quickly want to equalize when the seal is broken (door opened). So, absolute pressure is never negative, and is in fact never even = 0 in the real world. Gauge pressure on the other hand can be negative indicating a vacuum in the sense that there is less pressure inside the container than in the surroundings.

                                              [–]AQUA2 11 points12 points ago*

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                                              Boiler and pressure vessel engineer here...

                                              Atmospheric pressure is basically ~15 psi at sea level. That is always the pressure acting on a vessel or tank from the outside (assuming it's at sea level). On the inside, the pressure could be anything.

                                              Case 1: If the interior pressure is higher than 15 psi, then your pressure vessel is doing what it needs to and is resisting bowing outward or exploding.

                                              Case 2: If, however, that interior pressure is less than 15 psi (which could happen if you suck out all the gas inside the vessel), you have what is known as "partial vacuum". If that interior pressure is zero, then it's full vacuum.

                                              In either case you have pressure on one side higher than the other. To find out the force acting on the vessel walls, what you then do, is, subtract the pressures to get the net pressure acting on the vessel. Now, knowing that pressure is force per unit area (and since we know the area of the door), we can easily calculate how much force is acting on that door.

                                              While we're talking about pressure vessels, let's clear up a common misconception...that we pressurize airplane cabins so as to "balance" the inside pressure with the outside pressure.

                                              Remember, the higher the altitude, the lesser the atmospheric pressure (since atmospheric pressure is basically due to the weight of the atmospheric "sitting" on top of us, and the higher our altitude, the lesser there is atmosphere above us, so the lower the pressure), and so to balance the pressure, we would actually need to LOWER cabin pressure to balance the outside pressure....except we don't do that. We actually do the opposite...the reason being that we, humans, are physiologically not accustomed to lower partial pressures of oxygen, and can faint if pressures are too low, so interior pressure has to be higher than exterior pressure.

                                              So, yeah, an airplane is basically a pressure vessel. It needs to be designed to withstand the high interior pressures.

                                              [–]bonafidebob 1 point2 points ago

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                                              The other option for airplanes would be to add oxygen. That's what apollo did. And that's sort of what happens if the plane cabin loses pressure, except you just get the extra O2 through a mask.

                                              Worth noting that while the plane is at positive pressure compared to the air at altitude, it's still a lot lower than sea level pressure. It's just that the outside air is even more lower than sea level.

                                              [–]Darklyte 8 points9 points ago

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                                              I believe in this situation we are looking at a pressure differential. Since it is a 5 psi vacuum, the pressure is ~14.7 psi externally (one atmosphere of pressure) and 9.7 internally. Since we're looking at a pressure differential, a higher value would result in a stronger force of vacuum since it is a scalar rather than a vector.

                                              [–]punknoflowers 5 points6 points ago

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                                              So the door in the edit had an internal pressure value of 17.7?

                                              [–]Darklyte 1 point2 points ago

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                                              in the edit

                                              A bit confused by that, but to cause a vacuum the internal pressure would need to be less than the external pressure.

                                              [–]punknoflowers 2 points3 points ago

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                                              Of the original comment;

                                              Edit: Additionally there are a lot of people that don't know how pressure works. My friends dad lost some guys at work because they opened a hatch that was about the size of a door which was under 3 psi of pressure. It was something like 10,000 lbs of force when you did the math. The hatch blew open, killing the two guys in front of it and was found almost a quarter mile away.

                                              [–]Grumbleslol 1 point2 points ago

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                                              you are correct, 17.7 psi on the other side of the hatch.

                                              [–]Darklyte 1 point2 points ago

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                                              Ah. I didn't see that. Yes, the internal pressure was much higher internally. It had no where to escape since it was sealed, but once it had a way out, it ripped it open even further to equalize. 17.7 PSI would be about right, when you consider pressure from an absolute (0 PSI being in space or a complete vacuum).

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                                                  [–]greycubed 175 points176 points ago

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                                                  Really makes you appreciate just how badass we are to survive atmospheric pressure.

                                                  [–]malenkylizards 325 points326 points ago

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                                                  Not really...Our atmosphere is pushing against us in all directions, inside and out, so it's balanced. Dramatic things happen when there's a pressure differential, i.e., pressure inside is very different from pressure outside, like in that tank.

                                                  [–]1d3333 35 points36 points ago

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                                                  That's also why our ears pop when rising or descending.

                                                  [–]249ba36000029bbe9749 115 points116 points ago

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                                                  ...and why our heads explode when we see cool shit on the Internet.

                                                  [–]randomperson1121 51 points52 points ago

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                                                  How the fuck do you remember your username?

                                                  [–]Jethro_Tell 192 points193 points ago

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                                                  It's not that hard. It's HEX for '$›£`�›¾—I'

                                                  [–]jmoore93 32 points33 points ago

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                                                  I laughed WAY too hard at that.

                                                  [–]godspeed312 3 points4 points ago

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                                                  I was trying to find the pattern, and I got to that point except I saw almost all question marks...

                                                  (on a mac, not sure if that matters)

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                                                    [–]TheWorldEndsWithCake 7 points8 points ago

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                                                    It's got to be a link to something or a file name. Or, he just never logs out.

                                                    [–]yer_momma 7 points8 points ago

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                                                    Who remembers usernames or passwords, just use keepass and store the key file in your dropbox

                                                    [–]ztherion 6 points7 points ago

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                                                    Or just use Lastpass.

                                                    [–]CCCCCCCCCC 2 points3 points ago*

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                                                    +1 for lastpass. And to think I've been mucking around with remembering usernames for this long...

                                                    [–]RuafaolGaiscioch 1 point2 points ago

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                                                    This comment is made sooooo much more brilliant by the username, upvotes for being a year and seven months old

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                                                      [–]nkktwotwozero 1 point2 points ago

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                                                      Imagine his password.

                                                      [–]shpongolian 1 point2 points ago

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                                                      hunter2

                                                      [–]steals_your_fucks 1 point2 points ago

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                                                      How the do you remember your username?

                                                      [–]gives_fucks_back 1 point2 points ago

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                                                      Fuck.

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                                                        [–][deleted] 14 points15 points ago

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                                                        Like putting too much air in a balloon!

                                                        [–]veils1de 4 points5 points ago

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                                                        http://en.wikipedia.org/wiki/Eustachian_tube#Pressure_equalization

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                                                          [–]jayd16 230 points231 points ago

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                                                          Can't you just let us have this?!

                                                          [–]Audioworm 312 points313 points ago

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                                                          No. The reality of the physics is far more awesome than our speculations

                                                          [–]booksandpowertools 51 points52 points ago

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                                                          I dunno I can imagine some pretty awesome stuff... like aliens and shit.

                                                          [–]Audioworm 24 points25 points ago

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                                                          The probability of aliens, and the astrobiology that predicts possible characteristics is one of my favourite areas of biology. I collaborated with a biology masters student who was doing a project on life on other planets and she was looking at the damage of radiation on RNA.

                                                          We put several samples and exposed to ionising and non-ionising radiation. She was so enthusiastic about the subject and was happy to just to speak to people who cared as much as she did. It is a truly fascinating subject to look at.

                                                          [–]booksandpowertools 2 points3 points ago

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                                                          has there been any published research on the topic?

                                                          Also, science bonor achieved...

                                                          [–]JabbrWockey 1 point2 points ago

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                                                          ....but that's the probability of RNA forming on other planets. Wouldn't astrobiology be more interested in other poly-silicon or -carbon based information storage systems forming?

                                                          [–]Audioworm 3 points4 points ago

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                                                          It was a look into the viability of RNA as a stable molecule in hostile environments.

                                                          I am no expert of astrobiology but from the lectures I have heard, the approach for information containing is two fold. Half looks at whether DNA/RNA is a standard across the Universe, and the other half look at substitutes.

                                                          It is nice to use RNA and DNA as we know they do the job, so you can play with them and look at their possibilities in space

                                                          [–]JabbrWockey 2 points3 points ago

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                                                          I'm not an expert with astronomy, but I would wager that if some self-repeating information molecules formed on other planets it would not be similar to RNA. It would be interesting to see what other molecules could serve as substitutes.

                                                          It's crazy, but nucleic acids are not too far from computer code, just that cells have extensive libraries of object and functions to call upon. I wonder how hard it would be to write a new poly-silicate system with accompanying regulatory proteins.

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                                                                [–][deleted] 3 points4 points ago

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                                                                When you suck the air out of a plastic bottle it gets compressed because of the pressure outside - there is no air inside to make pressure as well so the bottle succumbs. Most people are probably familiar with this.

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                                                                  [–]mk5p 10 points11 points ago

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                                                                  Without pressure we wouldn't be able to survive, gas exchange in our lungs needs a pressure gradient.

                                                                  [–]popsicle_time 1 point2 points ago

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                                                                  that's kind of a convoluted point to make, considering the no pressure=no gas molecules anyway

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                                                                    [–]Revontulia 1 point2 points ago

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                                                                    One fun fact that I remember from A Short History of Nearly Everything is that our bodies would be remarkable good at surviving pressure wise in the depths of the oceans. We are made mostly of water which does not really compress meaningfully.

                                                                    Of course the various gasses in our bodies would kill us in those pressures. So, not perfect.

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                                                                      [–]epicGOPfail 13 points14 points ago

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                                                                      so, you're saying it's NOT an invisible giant ass?

                                                                      what if it were an invisible giant CAT ass?

                                                                      [–]3lbFlax 23 points24 points ago*

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                                                                      That kind of catastrophe would be worthy of a cat ass trophy.

                                                                      [–]jyunga 12 points13 points ago

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                                                                      shorter explanation for visual learners

                                                                      [EDIT]: k it's not shorter but it has boobies in the background.

                                                                      [–]moeriscus 2 points3 points ago

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                                                                      tl;dr PV=nRT

                                                                      [–]Methadose 1 point2 points ago

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                                                                      People should also take care when operating gas/liquid-gas torches and cutting implements. There are parts inside valves etc. which can act as a projectile and kill folks.

                                                                      Nothing wrong with reading a manual or watching an instructional video before operating equipment. Looking like you already knew something is not worth potentially losing your life over a simple mistake.

                                                                      [–]skylrk 1 point2 points ago

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                                                                      Sad thing, when a lot of nothing kills someone...

                                                                      [–][deleted] 1 point2 points ago

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                                                                      I remember seeing the pressure wave from nuclear explosion models, and being surprised how low the pressures were, iro 10 to 20 psi - then doing the maths on what that means to a house/human body.

                                                                      [–]jeaguilar 1 point2 points ago

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                                                                      4, 8, 15, 16, 23 and 42 would've helped.

                                                                      [–]XNatural 1 point2 points ago

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                                                                      Sadly everything I know about pressure comes from MythBusters and their hot water heaters episode.

                                                                      [–]ulrichomega 1 point2 points ago

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                                                                      Sadly?

                                                                      That episode was awesome.

                                                                      [–]discover16 1 point2 points ago

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                                                                      Judging by the hose coming out of the bottom, I'd say that they may have been pumping whatever was in the tank out, leaving no internal pressure. Atmospheric pressure then crushes the tank. That's 14.7 psi. A below comment mentioned a pressure door being blown off at 3 psi. Granted, the tank would cave before it was a complete vacuum, but there's the general idea.

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                                                                        [–]honkadoodledoo 102 points103 points ago

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                                                                        MFW I eat a warhead.

                                                                        [–]bogweasel87 13 points14 points ago

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                                                                        http://i.imgur.com/BS0uR.jpg

                                                                        [–]animaflux 13 points14 points ago

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                                                                        The url says sour.. too good.

                                                                        [–]marishtar 28 points29 points ago

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                                                                        This is the first time I have seen an acceptable use of "MFW."

                                                                        [–]papercowmoo 38 points39 points ago

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                                                                        this is because you're on reddit.

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                                                                          [–]rothw 35 points36 points ago

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                                                                          Oh you, Magneto!

                                                                          [–]SimilarImage 245 points246 points ago

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                                                                          Age User Title Reddit Cmnt Points
                                                                          2 years McJay No!! Invisible Hulk, don't sit th... ಠ_ಠ /r/WTF 519 1438
                                                                          2 months -Contrast- Implosion /r/pics 299 928
                                                                          9 months Moldybooks Tanker Implosion ! /r/gifs 43 271

                                                                          This is an automated response

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                                                                          [–][deleted] 127 points128 points ago

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                                                                          It's funny to see how as the title is less accurate and descriptive, the up votes increase.

                                                                          [–]TheWorldEndsWithCake 13 points14 points ago

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                                                                          I like a surprise every now and then.

                                                                          [–]-Contrast- 101 points102 points ago

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                                                                          I remember posting this like it was yesterday.

                                                                          [–]FlightOfGrey 4 points5 points ago

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                                                                          Take my upvote as a consolation prize.

                                                                          [–]BubbaWoop 4 points5 points ago

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                                                                          I know that feel bro. He be stealing your karma (that you stole off Moldybooks who stole of McJay)

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                                                                              [–]rcythr 63 points64 points ago

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                                                                              "If it fits, I sits"

                                                                              [–]Affar 7 points8 points ago

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                                                                              So giants and cats have something in common

                                                                              [–]moronic_comment 14 points15 points ago

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                                                                              Well you have to include the possibility that it is a giant cat.

                                                                              [–]skakruk 5 points6 points ago

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                                                                              Yeth

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                                                                                [–]ruddelsticks 24 points25 points ago

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                                                                                Guys, guys, it's just backwards. They're just pumping it up.

                                                                                http://reversegif.com/vwd

                                                                                [–]Tspyder90 2 points3 points ago

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                                                                                Or he's just standing up

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                                                                                  [–]redditMEred 46 points47 points ago

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                                                                                  http://www.youtube.com/watch?v=hsdC9GX1By0 original

                                                                                  [–]HellsquidsIntl 29 points30 points ago

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                                                                                  I'm quite impressed with how the OP shopped out the robot. You can barely see the pixels.

                                                                                  [–]zellthemedic 1 point2 points ago

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                                                                                  As an expert on giant mechs, I can say with absolute certainty that this is real.

                                                                                  Trust me. I played MechWarrior 1 - 4.

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                                                                                    [–]Reddit_Delenda_Est 7 points8 points ago

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                                                                                    Video

                                                                                    I wonder how much these cost.

                                                                                    [–]DecentOpinion 11 points12 points ago

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                                                                                    I know a guy who worked on that show Smallville as the special effects technician or whatever. Essentially they did all the non CGI stuff in a shop. This reminds me of when he told me how Superman was going to punch a car and it was going to crunch like in this GIF. They built half of a car's frame out of aluminum, and then had cables that attached in a punching shape to the inside of the frame. So when Superman punched the car, they pulled the cables and the inside of the frame and the aluminum just crumbled like that. Pretty cool effect technique.

                                                                                    [–]Drunken_Economist 15 points16 points ago

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                                                                                    My favorite

                                                                                    [–]damnclam 25 points26 points ago

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                                                                                    How in the name of god am I the first one to post this?

                                                                                    [–]paradigm_control 6 points7 points ago

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                                                                                    It was clearly an AT field.

                                                                                    [–]thetrueslug 15 points16 points ago

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                                                                                    Something something your mom won't have her dildo for the night.

                                                                                    [–]Gods_Real_Account 5 points6 points ago

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                                                                                    Did someone say my name?

                                                                                    [–]Lt_Shniz 6 points7 points ago

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                                                                                    Anyone else had to do that science experiment where you crush the can by creating a vacuum(or something)?

                                                                                    [–]crappuccino 1 point2 points ago

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                                                                                    Linked & discussed here: http://www.reddit.com/r/videos/comments/qsvhq/55_gallon_steel_drum_can_crush/

                                                                                    [–]2dayoldbread 2 points3 points ago

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                                                                                    This video has boobs in it.

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                                                                                      [–]acridmonious 4 points5 points ago

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                                                                                      The original video taken from one of the earlier threads. It was a safety demonstration.

                                                                                      [–]quaste 1 point2 points ago

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                                                                                      I like how there's music playing on the background (and there probably was beer involved). This kind of demonstration seems to be what german engineers do when it's party time.

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                                                                                        [–]joculator 2 points3 points ago

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                                                                                        This .gif is a graphic depiction of the eventual outcome of every big dream I've had.

                                                                                        [–]videopower 1 point2 points ago

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                                                                                        Everything is going to be ok. I know that feel.

                                                                                        [–]joculator 2 points3 points ago

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                                                                                        Thank you. There's nothing like a virtual hug, delivered over an internet forum, depicted by a bad line drawing of bald people to warm the heart.

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                                                                                          [–]njibbz 4 points5 points ago

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                                                                                          i like op's relevant username

                                                                                          [–]a9u1tar1st 12 points13 points ago

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                                                                                          It even collapses into the shape of a bum

                                                                                          [–]Jewlala 20 points21 points ago

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                                                                                          Some kind of three cheeked non-symmetrical giant ass.

                                                                                          [–]ecKohh 7 points8 points ago

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                                                                                          mmm, gurl. i love them creamy hips. all three of them.

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                                                                                            [–]Pungrongo 5 points6 points ago

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                                                                                            In case of implosion, look directly at implosion.

                                                                                            [–]scottyourban 2 points3 points ago

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                                                                                            Invisible giant doesn't have any fucks to give, apparently.

                                                                                            [–]AlexZander 2 points3 points ago

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                                                                                            The invisible giant was Probably_Fat

                                                                                            [–]AlphaKat 2 points3 points ago

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                                                                                            i hope this gets posted next week.

                                                                                            [–]BrownMofo 2 points3 points ago

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                                                                                            It seems like your mother's dildo has broken. I hope it wasn't too expensive.

                                                                                            [–]sterling_mallory 2 points3 points ago

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                                                                                            Good news: your mother's dildo arrived! Bad news: she sat on it. :(

                                                                                            [–]aFlyingGuru 2 points3 points ago

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                                                                                            Mundo sits where he pleases.

                                                                                            [–]KingoftheTrees 2 points3 points ago

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                                                                                            I could hear the sound of it crushing in my head.

                                                                                            [–]p0b 1 point2 points ago

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                                                                                            I still remember when Mr Wizard did this experiment.

                                                                                            [–]whatevers_clever 1 point2 points ago

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                                                                                            Checkmate, Atheists.

                                                                                            [–]erveek 1 point2 points ago

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                                                                                            "The Earth's Atmosphere: Invisible Giant"

                                                                                            [–]polka_will_never_die 1 point2 points ago

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                                                                                            Dat ass?

                                                                                            [–]omnipotent87 1 point2 points ago

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                                                                                            This needs to be Time warped.

                                                                                            [–]NathanielWinkel 1 point2 points ago

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                                                                                            I wonder if George Noory has seen this.

                                                                                            [–]tekdemon 1 point2 points ago

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                                                                                            The original video from ~3 years ago: http://www.youtube.com/watch?v=E_hci9vrvfw It's clearly a purposeful demonstration being filmed.

                                                                                            [–]TheSinglePlop 1 point2 points ago

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                                                                                            I work in a chemical plant and witnessed a tank do this first hand. I've also seen someone fall out from a nitrogen rich environment.

                                                                                            [–]caseydec 1 point2 points ago

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                                                                                            WhereEVA he wants.........anyone?

                                                                                            [–]SoModest 1 point2 points ago

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                                                                                            MUNDO GOES WHERE HE PLEASES

                                                                                            [–]dalen52 1 point2 points ago

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                                                                                            I guess I've reached that point in my reddit career where not only are the posts repeating but so are the comments. Either that or I'm clairvoyant.

                                                                                            I'm too lazy to find the original.

                                                                                            [–]DemianMusic 3 points4 points ago

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                                                                                            My thoughts too....must be a glitch in the matrix.

                                                                                            [–][deleted] 1 point2 points ago

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                                                                                            Invisible giant don't give a shit

                                                                                            [–]whiny-ass-titty-baby 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            I read this as 'invisible giant tits...'

                                                                                            I was confused.

                                                                                            [–]canehdianchick 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            Up-vote for in-genius title!

                                                                                            [–]Dr_Sandvich 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            I have seen this gif loads of times but the title made me laugh out loud for the first time, well done sir!

                                                                                            [–]johnnysocco3 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            That's like that video I saw on reddit that one time

                                                                                            [–]tviz33 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            Relevant username

                                                                                            [–]Dstanding 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            10293857384341th time I've seen this picture.

                                                                                            1st time I've laughed at the caption.

                                                                                            [–]WeaponsHot 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            I then farted and THIS happened.

                                                                                            [–]SEMIPROn 1 point2 points ago

                                                                                            sorry, this has been archived and can no longer be voted on

                                                                                            Is that... Little Sebastian!!

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