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->''"It's that moment of dawning comprehension I live for."''
-->-- '''Hobbes''', ''ComicStrip/CalvinAndHobbes''

The moment at which a character realizes that something really, ''REALLY'' bad is about to happen. Either that, or it already ''has'', and they are in big trouble because of it. They may not always say anything in particular when they do, but even if they don't, the look on their face clearly conveys to the audience their realization. This moment often features [[PrecisionFStrike stronger]] [[ClusterFBomb language]], and is when they truly realize that [[ExpospeakGag the solid organic waste is about to collide with the Rotational Air Circulation Device]].[[note]][[DontExplainTheJoke Shit hits the fan.]][[/note]] Sometimes the first few notes of Music/FryderykChopin's [[https://www.youtube.com/watch?v=umgty3qGCcY Funeral March]] are used as background music to highlight how grim the situation is.

They may feel that ThisIsGonnaSuck, and often exclaim, "YouHaveGotToBeKiddingMe" or perhaps "IWantMyMommy!" or sometimes even "ThisCannotBe" Other characters might emit a LoudGulp instead. Some might even [[DeerInTheHeadlights freeze in fear completely]].

The effectiveness of this moment can be affected by the difference between their usual competence and confidence levels and how completely they are boned. Characters with low self-esteem or who are constantly crying out in terror are difficult (but not impossible) to make this trope work with. But that [[SmugSnake arrogant]], [[ArrogantKungFuGuy so far unbeatable]] supervillain suddenly realizing they're about to have his ass royally kicked? Now we're talking!

Can occur if one protagonist has been [[BatmanGambit luring the other one into a trap]], or if they just have some [[LookWhatICanDoNow shiny new skill]]. Or they may simply be a lower-level villain who's just had the very bad luck to be confronted with a hero impossibly out of his league and is about to be on the wrong end of a CurbStompBattle. On occasion, [[ExplainExplainOhCrap they will be discussing the situation when they realize the full import of it.]] Related to ThisCannotBe, and the polar opposite of ObiWanMoment, when despite the bad situation someone still manages to look composed. May result in a HeroicBSOD for a heroic character, or even a VillainousBreakdown for a villainous character. Nine times out of ten, this will immediately follow [[WhatDoesThisButtonDo "What does this button do?"]]. The remaining tenth follow some other [[TemptingFate temptation of fate]]. Also a very common reaction when a villain, normally a ChessMaster, VillainWithGoodPublicity, or ManipulativeBastard, realizes they've just been the victim of an EngineeredPublicConfession. Some characters react with [[ThisIsGonnaSuck less despair and more apathy]]; others [[GonnaNeedMoreX look to their equipment]] for a solution. And for some, it is the [[HeroicBSOD crowning]] [[DarkestHour moment of]] [[DespairEventHorizon despair.]]

When this trope becomes {{literal|Metaphor}}, that's BringMyBrownPants--as Creator/BillCosby once said, "first you say it, then you do it!"

May also be a PrecisionFStrike for the person in question.

When most of the cast available in the scene does this expression, it's a MassOhCrap moment. If someone tries to explain the situation to someone else, and realizes ''half-way through their own explanation'' they're in real trouble, it's ExplainExplainOhCrap. If the person making the realization '''doesn't''' try to explain and says nothing but "Run," it's time to RunOrDie. If you realize you're in trouble ''after'' your explanation, or if someone tells you something really bad is about to happen and Oh Crap isnít your first reaction, it's a DelayedOhCrap. When you try to save some face by putting on a happy face, you make an OhCrapSmile. When you ''pretend'' to realize you are in trouble only to mess with your opponent, it's an OhCrapFakeout. When your primary reaction is resigned acceptance of the situation, it's ThisIsGonnaSuck. When a character [[PottyFailure soils him or herself]] upon this realization,[[note]]In other words, "Oh Crap" becomes literal.
The trope also applies to wetting themselves but that's less literal.[[/note]] it's BringMyBrownPants.

See also WideEyesAndShrunkenIrises. SayYourPrayers may be involved as part of this reaction.

Contrast HellYesMoment, the exact inverse.

'''[[color:red:Warning: High risk of spoilers.]]'''

%%If you have time, please take time to put examples in alphabetical order. This page Administrivia/HowToAlphabetizeThings should help you with that.

!!Examples Subpages:

* OhCrap/{{Advertising}}
* OhCrap/AnimeAndManga
* OhCrap/ComicBooks
* OhCrap/FanWorks
* [[OhCrap/AnimatedFilms Films ó Animation]]
* [[OhCrap/LiveActionFilms Films ó Live-Action]]
* OhCrap/{{Gamebooks}}
* OhCrap/{{Literature}}
* OhCrap/LiveActionTV
** ''OhCrap/DoctorWho''
** ''OhCrap/GameOfThrones''
** ''OhCrap/OrphanBlack''
* OhCrap/{{Music}}
* OhCrap/{{Pinballs}}
* OhCrap/ProWrestling
* OhCrap/{{Theater}}
* OhCrap/{{Toys}}
* OhCrap/TabletopGames
* OhCrap/VideoGames
* OhCrap/WebAnimation
* OhCrap/WebComics
* OhCrap/WebOriginal
* OhCrap/WesternAnimation
** ''OhCrap/MyLittlePonyFriendshipIsMagic''
!!Other Examples:


[[folder:Comic Strips]]
* ''ComicStrip/CalvinAndHobbes'': Pretty much every times Hobbes pounces on Calvin, Calvin makes an Oh Crap face just before impact. And it's always ''[[CrowningMomentOfFunny hilarious]]''.
** Our main page quote, however, comes from Hobbes hiding on a tree limb and dropping a single snowball in front of Calvin to get him to look up -- so he can see the full payload of snowballs Hobbes is about to dump on him from above.
** When he seceded from his family to go live in the Yukon, Hobbes wrestles command from him. As Calvin leaves him, announcing that he's going home, Hobbes reminds him that he no longer has a home, since he seceded from his family. His reaction is [[http://www.gocomics.com/calvinandhobbes/1987/09/22 priceless]]
--->'''Calvin:''' My life needs a rewind/erase button...
* ''ComicStrip/{{Garfield}}'': [[http://www.listen-project.de/garfield/index.php?date=08.12.2011 Jon is having a delayed reaction]].
* In ''ComicStrip/SpyVsSpy'', the losing Spy occasionally displays this expression when he realizes he's been out-schemed and is about to die in some humorous fashion.

* Q gets one in ''Pinball/StarTrekTheNextGeneration'' if you do well in the "Q's Challenge" mission.
-->'''Q:''' Okay, that's enough!
* In various Pat Lawlor games, a character will say something along the lines of this after successfully restarting multiball.

[[folder:Visual Novels]]
* ''Franchise/AceAttorney'' has plenty of these, both heroic and villainous.
** A villainous one is in ''Apollo Justice'' case four, when [[spoiler:Kristoph Gavin gets told that the murder he all but just admitted to committing is being tried by a jury... that just saw his huge streak of gloating.]] Then there's ''Ace Attorney Investigations'' where Edgeworth gets one when [[spoiler:Calisto Yew pulls a gun on him after he does the usual "corner-the-murderer" thing.]]
** [[spoiler:Matt Engarde]] in the final case of the second game, when [[spoiler:he realizes he's a dead man either way]]. The look combined with their VillainousBreakdown is one of the best moments in the series. It was also funny before when [[spoiler: Shelly De Killer]] does an OhCrap through a radio. Complete with it falling apart multiple times and sweating oil.
** Not that it tops the others, but in the 5th case of the first game, [[spoiler:Damon Gant.]] He gloats for about 10 minutes about how horribly he's going to punish [[spoiler:Phoenix, Edgeworth, Lana, Ema, Gumshoe, and every single person who tried to turn the tables on him]] using a very critical item as evidence. A minute later, Phoenix reveals one contradiction in the evidence that results in an Oh Crap moment where [[spoiler:Gant]] literally screams at the very moment of realization that said evidence suddenly makes the situation even ''worse'' for him.
** Another spectacular one is at the very end of ''VisualNovel/PhoenixWrightAceAttorneySpiritOfJustice'', when [[spoiler:Ga'ran is trying (and failing) to prove she has the spiritual powers needed to rule the land (she doesn't), and looks behind her to see her PraetorianGuard has just realized she's a fake, and thus an usurper, and are ''aiming her rifles at her, ready to execute her'' for her deception]]. As brief as it is in the middle of the breakdown, it's spectacular.
* ''VisualNovel/FateStayNight'':
** Gilgamesh vs Shirou at the end of UBW route. To his credit, a lot of the fear is more irritation at the fact that [[spoiler:some no name brat just ''cut his arm off'' before he could even try using his WaveMotionSword.]] The "oh crap" factor of the realization he is ''losing'' is ''still'' partially deflected by how gigantic his [[ItsAllAboutMe ego]] is.
** From the first route, both [[spoiler:[[BigBad Kirei]]]] and [[TheDragon Gilgamesh]] get a moment of this in their duels with Shirou and Saber respectively. [[spoiler: Kirei]] gets his when Shirou survives two curses containing [[TheCorruption ALL the evils of the world, ever; Past, Present and Future.]] (To be fair, Shirou did use [[spoiler: Avalon]] to survive the second one), before Shirou runs up and puches his chest out via an explosive magical dagger. Gilgamesh gets his when Saber uses [[spoiler: Avalon]] to block Ea, his [[EarthShatteringKaboom World Breaking]] WaveMotionSword, before she charges and cuts him in half with an Excaliblast. Gilgamesh gets quite a few of these, mostly when he realises that yes, there are people who can beat him.
** From ''Heaven's Feel'', there is the moment when True Assassin discovers that Rider's chain-dagger is lodged in his shoulder. Wall-slamming ensues.
* ''VisualNovel/UminekoWhenTheyCry'':
** Episode 6: From [[spoiler:"USHIROMIYA KYRIE CANNOT SAVE BATTLER"]] to [[spoiler:"You told me I could make the detective proclamation whenever I wanted, right? ......Well, unfortunately, ...I am no longer capable of making that proclamation."]]
** In Episode 3, this is Eva-Beatrice's reaction to Beatrice deciding to deny the existence of all witches, after which she panics but is held down by Ronove until Beato's denial burns her away.
* In ''VisualNovel/KatawaShoujo'', Rin has this when she realizes that on Friday night, she only has one more day to complete her mural before the festival on Sunday.
* ''VisualNovel/HatofulBoyfriend'' gives you two options when Yuuya is confronted by [[DeadlyDoctor Doctor Shuu]] and he lies about having been with you a few moments beforehand. You can choose to go along with Yuuya's lie. But if you choose to tell Shuu that he's lying, Yuuya has just one thing to say...
-->'''Yuuya:''' ...Shit.
* In ''VisualNovel/{{Sickness}}'', this is said aloud by Suoh right before he almost passes out after his first day of training.