A consequence of the RuleOfPerception: Air, which you can't see, doesn't actually exist.

Some applications:

* If you [[TimeStandsStill stop time]], so that everything in the world is frozen in place except you, you can move around easily; you are not held immobile by the air molecules frozen in place around you. (Suffocating is also not a problem.)
* If you can travel at SuperSpeed, you don't have to worry about air resistance or friction.
* If you are [[TeleportersAndTransporters teleporting]] somewhere, it's important to arrive in an empty space where you won't be [[TeleFrag intersecting any solid objects]], but you don't have to worry about intersecting the air molecules that are probably swarming through your empty space.
* You can carry {{antimatter}} around in the open, without worrying about it annihilating anything -- provided it doesn't touch any solid objects.
* If you are shrunk to the size of an ant, you can still breathe, even though your lungs are now trying to insert 'regular sized' air molecules into your bloodstream - like shoving volleyballs through the eye of a needle.
* If you become [[{{Intangibility}} intangible]] so solid matter passes through you without interacting with you at all, this won't apply to air. You can still breathe and talk normally.

Related:
* FrictionlessReentry: Atmospheric resistance and friction don't exist for spacecraft entering and leaving a planetary atmosphere.
* BatmanCanBreatheInSpace: Since breathing on Earth is possible and air is not there, it should be just as easy to breathe in space when the air is also not there.

For characters with superpowers, may be a consequence of RequiredSecondaryPowers.

!!Examples

* Frank Herbert's ''[[Literature/{{Dune}} Heretics of Dune]]''
* ''Series/StarTrekTheOriginalSeries'' episode "Wink of an Eye"
* ''Series/TheWildWildWest'' episode "The Night of the Burning Diamond"[[note]]This was also an aversion, in that moving too fast could set you on fire from the air friction.[[/note]]
* ''Series/{{UFO}}'' episode "Timelash"
* ''Series/TheTwilightZone'' TOS episode "A Kind of Stop Watch"
* ''Film/{{Clockstoppers}}'' has [[AppliedPhlebotinum hypertime watches]] that effectively stop time by making the wearer move really, really fast. The atmosphere never presents any problems (nor does their drastically increased mass, which is another thing that happens when you move fast enough to make time noticeably slower).
* Literature/{{Momo}}, from the novel by Michael Ende, can move just fine even when everything else has been frozen in time.
* ''Series/TheOuterLimits'' TOS episode "The Premonition"
* ''Series/StarTrekTheNextGeneration'' episode "The Next Phase". Geordi and Ro are accidentally phased so that they can pass through solid matter, but breathing (which is inhaling tiny particles of unphased matter) is not an issue. They can also ''talk'' to each other (expelling ''air'' to do so? nobody else can see or hear either of them). Ro's initial assumption that they have died in the accident and are actually ''ghosts'' makes more sense given the number of other things they ''can'' do but ''shouldn't'' be able to while phased.

!!Aversions

[[foldercontrol]]

[[folder:Anime & Manga]]
* Generally averted in ''Manga/KimagureOrangeRoad'': when the Esper protagonists teleport, it always causes a short but violent air displacement, both at the spots of departure and arrival. One episode feature the variant of time-stopped people ignoring air, though.
* In ''Anime/DragonBallZ'', Guldo of the Ginyu Force can only stop time as long as he can hold his breath. This makes sense, since he wouldn't be able to breathe if the air was frozen in place.
[[/folder]]

[[folder:Comic Books]]
* Nightcrawler from the ''Franchise/XMen'' goes "BAMF" on teleporting in and out because he's displacing air molecules. The sound is actually the air ''collapsing'' on the space he has suddenly vacated (the 2nd movie actually uses a very realistic sound for the collapse of a human-sized vacuum). He also makes the sound when appearing because, presumably, the same thing is happening, just in reverse. Those molecules that were where he's appearing are pushed out of the way, and fast.
* The various speedsters know as Franchise/TheFlash all have an aura specifically to protect them from air friction. (Wally West even once ''removed'' it from someone he was carrying...) A "possible future" story featured Wally's son, who had the SuperSpeed but not the aura, and was incapable of using his powers without being burned alive.
[[/folder]]

[[folder:Films -- Animation]]
* In ''WesternAnimation/TheIncredibles'', when Edna Mode explains to Helen about the [[MySuitIsAlsoSuper suits]] she designed for the Parr family, she mentions specifically making Dash's suit out of a material that can "withstand enormous amounts of friction without heating up or wearing out" so he can run hundreds of miles per hour in it. Regular cloth, in other words, would be worn down to shreds or burst into flame in a very short time.
[[/folder]]

[[folder:Literature]]
* In the novel ''Discworld/ThiefOfTime'', the Monks of History use special equipment to slow down time relative to themselves, but can still move and breathe because the time dilation field extends beyond their own bodies. This would have unfortunate effects if the field partly eclipsed a living thing, so extreme care with the equipment is needed. Susan, like the History Monks, carries her own little bubble of personal time with her; when she stops time and walks out in a snowstorm, she leaves a tunnel of empty air behind her because the snowflakes resume falling when she comes near.
* In Creator/HGWells's short story "The New Accelerator", moving thousands of times faster than normal causes the protagonists to heat up due to friction with the air.
* In Wells's story "The Man Who Could Work Miracles", the title character stops the earth from spinning. Due to the Law of Conservation of Angular Momentum, the atmosphere starts going into space.
* In the ''Series/DoctorWho'' TieInNovel ''Nuclear Time'', when the Doctor's personal timeline briefly un-reverses, he chokes on air that is suddenly being inhaled rather than exhaled.
* In Creator/SergeyLukyanenko's ''Literature/TheStarsAreColdToys'', it is strictly forbidden to activate the jumper prior to exiting the atmosphere. The protagonists are forced to do this when escaping, even though they know the displaced air may cause hurricanes.
* ''The Cyborg and the Sorcerers'' by Creator/LawrenceWattEvans is one of the few works with a DisintegratorRay to consider the issue of the ray having to disintegrate all the intervening air molecules before it reaches its intended target.
* Every instance of teleportation into air in the Literature/YoungWizards series is accompanied by a loud bang of displaced air, frequently described as sounding like a gunshot or a car backfiring. The gust of air has also knocked stuff over at least once.
* In ''Literature/GoodOmens'', when the Hellhound transforms into a small terrier as per his master's wishes, the narration makes reference to the sound caused by air rushing into the vacuum it had previously occupied.
* ''The Girl, the Gold Watch and Everything'' by [=John D. MacDonald=]. The narrator describes the air as feeling thicker and harder to breathe, and being slightly resistant to movement. Semi-justified by the time-stopping gadget not literally ''stopping'' time, but slowing it down to where one second of slow time, subjectively perceived, equals one three-hundredth of a second in normal time.
* In Creator/StephenKing's ''Literature/{{IT}}'', every time Pennywise teleports away it's mentioned that there's a cracking noise as the air rushes to fill the suddenly empty space.
[[/folder]]

[[folder:Live-Action TV]]
* ''Series/{{Battlestar Galactica|Reimagined}}'': It is subtle, but when ships perform FTL jumps, they cause a small, localised vaccuum around them. When air is present (inta-atmos jumps, leaking from space stations, etc.), it is seen getting sucked out alongside the jump. It should be noted that the FTL "bubble" around the ship sucks any matter, not just air. This was shown on several occasions, first when [[spoiler:Galactica jumped just above the surface of New Caprica, causing huge gusts of wind as more air filled the newly-created vacuum]], then when [[spoiler:Boomer's jump away from Galactica tore the ailing ship's hull]] and later when a group of Raptors jumping from the unused landing bay caused the whole bay to rip like paper.
* Similar to the Flash, Stephanie Powell from ''Series/NoOrdinaryFamily'' has a plasma shield which protects her from the friction of the air, and other similar issues.
* In the ''Series/StarTrekDeepSpaceNine'' episode ''[[Recap/StarTrekDeepSpaceNineS06E14OneLittleShip One Little Ship]]'', a spaceship with Dax, O'Brien and Bashir has been shrunk to the size of a small toy. At one point O'Brien suggests beaming out of the ship, but Bashir says he would suffocate, as his miniature-sizes lungs wouldn't be able to process regular-sized air molecules. However, the air molecules inside the ship have shrunk with it, as the three are still able to breath inside. They are able to use the shrunken air to temporarily breath outside the ship too.
[[/folder]]

[[folder:Tabletop Games]]
* ''TabletopGame/{{Warhammer 40000}}'': Teleporting causes a distinct thunderclap as air rushes in to fill the now empty space.
[[/folder]]

[[folder:Web Original]]
* The aversion of this trope has come into play several times in [[Webcomic/{{xkcd}} Randall Munroe's]] blog ''What if?''
** [[http://what-if.xkcd.com/1/ What would happen if you tried to hit a baseball pitched at 90% the speed of light?]]: The ball would never even reach the batter, because a baseball suddenly moving at relativistic speed through the atmosphere will undergo nuclear fusion with air atoms within nanoseconds. The result is ''awfully'' similar to a thermonuclear bomb detonating.
** [[http://what-if.xkcd.com/6/ What if a glass of water was, all of a sudden, literally half empty?]]: If it were, as most people would assume, the top half, not much would happen other than the now-familiar loud sound caused by the air rushing in to fill the vacuum. If it were the ''bottom'' half, the results would be considerably more dramatic.
[[/folder]]

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