It can be hard to show all the aspects of a fictional ability since such a thing does not have any RealLife context to which the audience can relate. So when a creator wants to show that using a special power takes a toll on a character, he will often have the character faint afterward.

This is especially true when the character uses a power for the first time. Presumably, the strain of using it is too much for him, causing his mind to shut down in self defense.

Frequently used for powers that aren't very flashy in order to make them seem more dramatic, such as telepathy and other PsychicPowers.

If the fainting is a symptom of a more serious health problem, it's also a case of HeroicRROD. When it happens the first time a power is used, it's related to HowDoIShotWeb. Can be a form of BlessedWithSuck.

If the collapse is after a dramatic win, especially a battle, and is used to skip the boring aftermath, it's PostVictoryCollapse.

Compare to FaintingSeer, which may overlap for {{Seer}}s. May overlap with CastFromLifespan.
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!! Examples:

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[[folder:Anime and Manga]]
* In ''Anime/MetalFightBeyblade'', Madoka faints after using her bey to save Kyoya's Leon. It's explained as her "not being used to blading."
* In ''Manga/CardCaptorSakura'', Sakura sometimes collapses after transforming Clow Cards into Star Cards. She knows that doing so will build her power, so she rushes it.
* In ''Anime/DigimonAdventure'', little Kari emits a light so powerful that her Digimon allies digivolve on contact. However, she has trouble walking, and near the end of the episode, she keels over. Fortunately, by that point, her brother, Tai, is there to pick her up.
* In ''Anime/{{Yugioh}}'', Yugi is strained while dueling in a Shadow Game with Pegasus. Yugi faints, and Yami is forced to take over.
* ''Manga/{{Bleach}}'': Jakuho Raikoben severely drains Soi Fon's reiatsu, enough that it usually takes her three days to recover before she can safely use it again.
* ''VisionOfEscaflowne'': Hitomi's ability to see into the future, via Tarot Cards, often has this effect on her afterwards. It's eventually revealed that both the duration and the severity of her fainting spells is determined by her emotional state. Meaning, the greater her anxiety, the greater its toll on her following her vision; not to mention the part about [[spoiler: her anxiety making those visions come true!]]
* In ''Manga/SoulEater'', Sid collapses after using his power to get the main characters and Stein outside of the trap set for the whole school. In fairness to him, he ''had'' just nearly been blown up then rushed all the way back to Death City.
* ''[[Manga/DragonBall Dragon Ball Z]]'': When Gohan first goes [=SSJ2=] he triggers it for only a second and then passes out. This was seen in one of Goku's flashbacks of their training in the time chamber and was the moment that convinced him that Gohan could beat Cell if he could sustain that power, which he did.
* ''Anime/SailorMoon'' usually faints or at least collapses and loses her Super form after using her Rainbow Moon Heartache attack in the ''S'' series, although that restriction on her Super form doesn't apply during ''[=SuperS=]'', probably because she's using a power source other than the Holy Grail in that series. She also has this problem in the first few episodes of ''Stars'', when she first tries to become Eternal Sailor Moon, and like with ''[=SuperS=]'', the problem disappears once that becomes her default form when the Animamates start appearing.
* In ''{{Slayers}}'', the [[DangerousForbiddenTechnique Giga Slave]] spell has this effect on Lina (as well as [[PowerDyesYourHair turning her hair white for a few days]]).
* In ''MegamanNTWarrior Axess'', after repelling the VillainOfTheWeek [=SavageMan=], Lan faints after exiting [[FusionDance Cross Fusion]] with [=MegaMan=].
* In ''HunterXHunter'', Kurapika does this if he spends too long with the Scarlet Eyes activated.
* Luffy of ''Manga/OnePiece'' falls into this after some of his fights. Usually it's the result of blood loss or poison, though after Enies Lobby and Thriller Bark he passes out from the strain of his Gear 2 technique, which is basically increasing the speed of his blood flow- if it wasn't his rubbery body, the stress on his heart would kill him.
* At the end of penultimate episode of ''Anime/MagicalGirlLyricalNanohaAs'', Hayate faints after she uses her powers as the [[PersonOfMassDestruction Queen of the Night Sky]] for the first time to help defeat an EldritchAbomination.
* "Blackout Syndrome" appears in the climatic end of ''Anime/FutureGPXCyberFormula''. The tremendous g-force generated from driving a formula car over 580km/h around the roller-coaster downhill corner causes a driver to go blind for a few seconds. Hayato, [[{{Determinator}} who pushes beyond 600km/h]], almost collapses in the final lap.
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[[folder:Comic Books]]
* U Go Girl from the short-lived Mike Allred ''ComicBook/XForce''. Her power would literally drain her energy and she'd more than occasionally pass out after using her whirly teleportation.
* In early issues of ''ComicBook/{{Runaways}}'', [[CuteBruiser Molly]] would black out from exhaustion after a throwing a single punch. As she got more used to it she wouldn't pass out, but would still need a nap after using her powers.
* Many telepaths of the various ''Franchise/{{X-Men}}'' incarnations do this at least once in almost all of their adaptations.
* Starfire, in her very first appearance in the ''Comicbook/TeenTitans'', faints after using her powers.
* Rogue in ''ComicBook/{{X-Men}}'' faints after some time if she [[PowerCopying absorbs the powers]] of a sufficiently strong superpowered person, such as Magneto.
** {{Storm}} in ''ComicBook/{{X-Men}}'' passed out in mid-air after powering down a planet-threatening supercell of her own creation (Dr. Doom had trapped her as a statue and creating the supercell was her hysterical claustrophobic reaction to being trapped thus).
* At the beginning of ''{{Ultimate X-men}}'' Storm had a tendency to faint, not from the use of power itself but from the mental effort required to reduce collateral damage - since she had no experience with aiming her lightning.
* Happens to Comicbook/DoctorStrange on occasion, since magical exertion takes a toll on the body. Once he muttered, "I never used to black out. Now it seems it's all I do."
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[[folder:Fanfiction]]
* In the ''FanFic/FacingTheFutureSeries'', Danny does this whenever he comes out of his out of control SuperMode.
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[[folder:Film - Animated]]
* ''TheSecretOfNimh'': Also happens to Mrs. Brisby, immediately after [[http://www.youtube.com/watch?v=8Q6WCdQm2Jo the film's climax]], wherein she uses [[MacGuffin The Stone]] for the first and only time to move her home. She collapses as its power subsides, then passes out.
* ''{{The Incredibles}}'': Violet suffers this for a few seconds when her force-field is put under extreme pressure.
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[[folder:Film - Live Action]]
* ''Film/TheMatrix Reloaded'': At the conclusion, in the real world, Neo and the crew of the ''Nebuchadnezzar'' escapes a bomb [[spoiler:that destroys their ship]], only to find themselves about to be ripped apart by [[KillerRobot Sentinels]]. [[spoiler:However, Neo can now somehow sense and communicate with real-world machinery. He hacks the five Sentinels, causing them to short and deactivate.]] The process causes Neo to fall unconscious [[spoiler:and inadvertently jack himself, without hardware, into a Matrix-connected construct world, temporarily imprisoning himself.]]
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[[folder:Literature]]
* In ''[[Literature/InheritanceCycle Eragon]]'', Eragon's first attempt at casting combat magic caused him to lose consciousness because it took a large amount of energy out of him at once.
* Alaric Morgan is apt to do this, since he's a bit of an overachiever and {{Deryni}} [[PowerAtAPrice powers are physically taxing to use]]. In ''High Deryni'', Morgan tries to contact Derry mentally (sending a Call) during the reconciliation service for himself and Duncan and faints from the effort; Duncan makes the excuse that his cousin isn't used to fasting. He also collapses from overextending himself to Call on campaign in ''The King's Justice'', and Kelson scolds him for pushing himself too hard.
* Physical exhaustion is the main symptom of overchanneling in ''Literature/TheWheelOfTime'', even to the point of unconsciousness. In extreme cases it can also cause a permanent loss of one's powers.
* In the ''Literature/DresdenFiles'' books, wizards feel fatigue when they use a lot of magic. Pushed too far, it certainly can cause a blackout.
* Happens frequently to seers and to the [[GodEmperor royals]] in TalesOfTheBranionRealm -- when you've literally just exploded into flames, it takes a lot out of you. Leads to PostVictoryCollapse in some cases.
* After practising her telekinetic powers by suspending a cigar in mid-air, ''Literature/Matilda'' is so exhausted she goes straight to sleep.
* In ''Literature/TheLeftHandOfDarkness'' Estraven -- the native of the planet Winter -- has been trained to enter a state of "dothe" greatly increasing his strength and endurance. But the period of great strength is followed by a longer period of "dark sleep". Once he dragged the Earthling protagonist to safety and let himself relax, he slept 2 days straight, woke to eat, then slept some more.
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[[folder:Live-Action TV]]
* Willow, of ''Series/BuffyTheVampireSlayer'', often collapsed after over-exerting herself during spellcasting. She also sometimes experienced a PsychicNosebleed
* ''Series/{{Smallville}}'': When Chloe first uses her healing power, she collapses so completely doctors think she's dead. She actually ''takes on'' the person's injury, but didn't know that, and Lois had apparently been killed. It looked as she had traded her life for Lois's, but thankfully, she got better. She used her power to that degree once more, and stayed apparently dead for 18 hours.
* ''Series/KamenRiderBlade:'' The title character passes out after all his early uses of [[SuperMode King form]]. So does anyone standing close enough to actually witness him using his final attack on a MonsterOfTheWeek. King Form is one of KR's 'so powerful it may be too much of a good thing' modes, such as were seen back in ''Series/KamenRiderKuuga.''
** ''Series/KamenRiderOOO'' sometimes passes out after using a full combo.
* ''Series/TokusouSentaiDekaranger'' sometimes has Jasmine overtax her psychometry powers and become a FaintingSeer.
** In ''Series/HikoninSentaiAkibaranger'' Nobuo collapses after he uses HeroicResolve [[spoiler:to transform in the real world for the first time]].
* In ''The Peacekeeper Wars'', the miniseries sequel to ''Series/{{Farscape}}'', Crichton collapses and is rendered catatonic after shutting down the wormhole he created to force peace between the Scarrans and Peacekeepers. The sequence is somewhat unclear whether this is a result of the process of the mechanism itself, (which appears to involve some form of mental interface) or the alien "Einstein" removing wormhole weapon knowledge from his mind at the same time.
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[[folder:Tabletop Games]]
* ''{{Champions}}''. Normally, Endurance is used to fuel a character's power use. If a character runs out of Endurance, he can use Stun instead. If his Stun runs out, he falls unconscious.
* ''DungeonsAndDragons'': ''Deities and Demigods Cyclopedia'' (1980). If the Norse god Odin uses his powers to heal anyone, he falls asleep for 1 to 10 days.
* In the ''TabletopGame/DresdenFiles'' RPG, as in the books, spellcasting causes physical strain on the caster in two ways: firstly, calling up ''any'' magic at all (well, any evocation, and any ritual magic over a certain threshold of power) damages the character's mental stress by a small amount. Worse, if they call up more power than they can use (either [[DesperationAttack in desperation]] or [[PowerIncontinence because they screwed up a roll]]), they have to take the excess as either ''backlash'', which is this, or ''fallout'', which is [[CollateralDamage worse]].
* In ''TabletopGame/{{GURPS}}'', strenuous activities, some power uses, and spell-casting, all cost Fatigue Points (FP); powerful spells and some powers may be defined to cost a lot of them. Running really low on FP can cause a character to suffer penalties to movement and other actions. If necessary, after running out completely, the character can go on to spend Hit Points (HP) in place of FP, and running out of those can eventually cause some kind of total collapse.
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[[folder:Video Games]]
* In ''StarOcean3'', Fayt faints after activating his genetic Symbology ability Destruction for the first time. He also suffers some temporary memory loss from the event, indicating that it was especially psychologically traumatic.
** A flashback shows Maria passing out the first time she used her power of Alteration. It's heavily implied she also lost her memory of the event.
* In ''VideoGame/DragonAgeOrigins'', Wynne's plot power Vessel of the Spirit leaves her stunned and disoriented after every time she uses it. This effect is only alleviated after completing her personal side-quest.
* ''SuikodenIV'' presents another rare male variant, which has [[HeroicMime Lazlo]] faint after each use of the Rune of Punishment, [[spoiler: due to it draining its host's lifeforce with each use... [[HeroicRROD until it finally kills them.]] This can be averted by successfully recruiting all 108 Stars of Destiny.]]
* ''{{Persona 3}}'': the MC falls unconscious for a few days after summoning his Persona for the first time.
* Happens a few times to Vincent Valentine in Dirge of Cerberus. When [[spoiler: his most powerful demon, Chaos, emerges he passes out afterwards the first time this happens in the game.]] Later uses of this ability sometimes just cut back to him lying on the floor and resting for a time.
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[[folder:Web original]]
* PonyDotMov: In SWAG.MOV, [[spoiler: Rainbow Dash turns into a huge anthropomorphic pony to battle Discord. After finally killing him, she shrinks and faints.]]
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[[folder:Webcomics]]
* When Raezinus from ''Webcomic/DeverishAlso'' demonstrates the portal spell and it becomes important to keep it open for a while, he eventually passes out from the strain of keeping the spell going for so long.
* In ''TheCyantianChronicles'', the first time Darrik's [[EnergyBall energy manipulation abilities]] activate, [[http://cyantian.net/akaelae/2009/01/26/01262009/ he tosses]] [[http://cyantian.net/akaelae/2009/01/28/01282009/ a horse]]. It uses so much of he energy that he is left [[http://cyantian.net/akaelae/2009/01/30/01302009/ nearly unconscious]].
* In ''{{Spacetrawler}}'', Eebs (or humans like Yuri with Eeb brain implants) will black out if they strain their telekinesis by moving objects that are too massive. Too much of this strain can outright kill them. [[spoiler:It's later revealed that this limitation is a result of brain-clamping--we've yet to see an upper limit on how much matter an unclamped Eeb can move telekinetically.]]
* In ''{{Drowtales}}'', it's possible to blackout from overuse of mana. It actually happened to a weaker student in chapter 2. In later chapters Ariel and Chirinide exert themselves enough to become woozy after battle. Those who are more proficient in the mana arts are capable of killing themselves through exertion.
* In ''Webcomic/ElGoonishShive'', this [[http://www.egscomics.com/?date=2002-03-10 happens to Grace]] after she uses her telekinesis for the first time to [[MuggingTheMonster disarm a mugger]].
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[[folder:Western Animation]]
* This happens to Danny ''all the time'' in ''WesternAnimation/DannyPhantom''.
* In the ''FantasticFourWorldsGreatestHeroes'' episode "Recap/{{Doomsday}}", Reed experiences this after stretching far enough to close the Negative Zone portal. Unfortunately, he's high in the air when it happens.
* In the 1990s [[WesternAnimation/{{X-Men}} animated series]], Jean does this after using her powers on Juggernaut to give him LaserGuidedAmnesia.
** She does so again in a later episode, after showing Candra the truth of the Assassin's betrayal.
* In ''WesternAnimation/{{Wolverine And The X-Men}}'', Christy faints after using her [[DishingOutDirt earth powers]] to protect herself, her father, Wolverine, and Mystique from an explosion.
* ''WesternAnimation/AvatarTheLastAirbender'': The first time Aang enters the Avatar State in the pilot episode and several times in the first season before he gets used to it, he is visibly exhausted afterward. By Season Two, he's typically okay even if emotionally distressed.
* ''WesternAnimation/TheLegendOfKorra''; in the OriginsEpisode, Wan's first attempt at merging with Raava and using all four elements burns though his energy rather quickly and causes him to pass out. Once he fully fuses with her and becomes the Avatar, he doesn't have this problem any more.
* Niko of ''[[WesternAnimation/AdventuresOfTheGalaxyRangers Galaxy Rangers]]'' will occasionally overtax herself, draining her implant and her natural abilities and end up knocked out or barely conscious for a while. The upside is that if it gets to that point, she's probably just saved everyone's ass with it.
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[[folder:Real Life]]
* Music/TomJones allegedly fainted upon singing the long and loud final note in the theme song to ''Film/{{Thunderball}}''.
* Wrestling/DwayneJohnson blacked out after filming the scene in ''Film/{{Hercules 2014}}'' where Hercules roars, "I AM HERCULES!!" and [[BreakingTheBonds breaks free of his chains]], since they used real chains and he also strained his lungs to the limit with the scream.
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