History Main / SanitySlippage

* MyLittlePonyFriendshipIsMagic: In one episode, Twilight Sparkle's mentor is coming to visit, but the town is infested with locust-like bugs that eat everything in sight. She is running out of time, and then she snaps for a brief moment. Leading to this:
--> Twilight Sparkle: "Okay, here's the plan: Rainbow Dash, you distract them. Good! Everyone else, we need to build an exact copy of Ponyville over there. We got less than a minute!"

** There was also the time she tried to figure out Pinkie's "Pinkie Sense".
** And when she thought a tree crashing through her window was part of a sleepover.
** And "Green is not your color", this pony needs a good psychiatrist.

** His Let's Play of ''{{Eversion}}'' is his best example of pretending to lose his sanity due to the game's NightmareFuel. His blind run of [[PlanetHeck Hell Temple]] from ''{{La-Mulana}}'' is his best example of ''really'' losing his sanity due to the game's [[NintendoHard unrelenting cheapness]].

* Everyone in the {{World of Darkness}}. Everyone from normal humans to blood-hungry vampires to reality-bending mages has a Karma Meter. As you slide down the slippery slope, you tend to become a little more unstable with each step you go, until finally, humans are reduced to raving lunatics, vampires and werewolves just plain go nuts and become meat-hungry animals, mages and changelings fly off the deep end and lose the ability to separate reality from fantasy, and prometheans just lose hope of becoming humans.

* [[DoctorHorriblesSingAlongBlog Dr. Horrible]] has a couple of these when his kind and decent Billy persona attempts to assert itself until The Doctor's SplitPersonalityTakeover cements itself permanently.
** This, however, could just be the wind in the EpilepticTrees.

* ''AssassinsCreed'' had mentions of Subject 16, who committed suicide after excessively prolonged Animus sessions caused mental breakdown due to the "Bleeding Effect," where the Animus subject may gain their ancestor's abilities but end up being unable to mentally distinguish themselves from the ancestor, though Desmond only ends up gaining his ancestor Altaïr's Eagle Vision ability. In ''AssassinsCreedII'' this is deliberately invoked in an attempt to quickly train Desmond to become an Assassin, but along the way Desmond suffers visual hallucinations and experience (in his sleep) one of Altaïr's memories without being in the Animus. By ''AssassinsCreedBrotherhood'' he's become an Animus-trained Assassin but the hallucinations have gotten more frequent, are now both visual and auditory (sight and sound) and may not even be from his ancestor Ezio's memories. On at least two occasions Desmond inadvertently refers to himself in the first-person when describing Ezio's actions, and later in the game an e-mail reveals that the other modern-day Assassins have heard Desmond screaming in his sleep.
** Just to [[ItGotWorse make it worse]], Desmond is self-conscious of his own growing mental instability, at one point in ''Brotherhood'' wondering how long it'll be before he "starts painting symbols on the walls" (referencing Subject 16).

* Dr. Seward in his appearance in ''AnnoDracula''. You have to give him a little insanity though; it's an AlternateHistory of ''{{Dracula}}'' where instead of the EarnYourHappyEnding situation of rescuing Britain from a supernatural evil while losing (only) your fiancee and an American friend, he lives through a [[DiabolusExMachina Diabolus Ex]] [[KillEmAll Kill 'Em]] [[TheVirus Or Corrupt 'Em]] scenario. If he still had his sanity, he'd be closer to an IdiotHero by that point.

* Taken to {{Tearjerker}} levels with people diagnosed with schizophrenia. The symptoms don't usually appear until late teenage and early adult years(16-25), so you could be mentally healthy one moment, and then the next, you gradually slip down the slippery slope towards delusions, hallucinations, mood disorders, and even states comparable to an empty shell.

[[SelfDemonstratingArticle They've come for me! All of them! Ascendancy at last! Hahahaha!.]]

* In HadashiDeBaraWoFume, [[spoiler:Nozomu, who at first seems like a really {{nice guy}} gradually becomes more and more of a psychotic Yandere as the series goes on.]]

[[folder: Anime and Manga ]]

[[folder: Comic Books ]]

[[folder: Film ]]

[[folder: Literature ]]

[[folder: Live Action TV ]]

[[folder: Music ]]

[[folder: Roleplay]]

[[folder: Tabletop Games ]]

[[folder: Video Games ]]

[[folder: Web Comics ]]

[[folder: Web Original ]]

[[folder: Western Animation ]]

[[folder: Real Life ]]

* ''"It doesn't hurt at all!"'' In PuellaMagiMadokaMagica, we can see Sayaka starting to break down as she fights a witch. [[spoiler:Why? Because a friend of hers had just told her that, in one day, she was going to confess to the boy Sayaka loved. That was just the last straw, though. Other factors certainly [[BreakTheCutie helped]].]]

*** "This is because, as is [[CallBack now painfully obvious to anyone with a brain]], you have basically [[spoiler:gone completely off the deep end in every way.]] You have officially gone grimdark.]]"

*** "This is because, as is now painfully obvious to anyone with a brain, you have basically [[spoiler:[[CallBack gone completely off the deep end in every way.]] You have officially gone grimdark.]]"

*** "This is because, as is now painfully obvious to anyone with a brain, you have basically [[spoiler:[[CallBack gone completely off the deep end in every way.]] You have officially gone grimdark.]]""

* Taken to {{Tear-jerker}} levels with people diagnosed with schizophrenia. The symptoms don't usually appear until late teenage and early adult years(16-25), so you could be mentally healthy one moment, and then the next, you gradually slip down the slippery slope towards delusions, hallucinations, mood disorders, and even states comparable to an empty shell.

* [[InFuryBorn Alicia DeVries]] suffers this throughout the second half of the book due to [[DemonicPossession being possessed]] [[LastOfHerKind by the last of]] [[GreekMythology the Greek Furies]]. Culminates when she discovers the identities of the [[TheMole traitors]] within [[spoiler: the [[TheEmpire Imperial]] [[StandardSciFiFleet Fleet]]]], and subsequently goes [[RoaringRampageOfRevenge batshit crazy]]. Fortunately, she is [[IKnowYoureInThereSomewhere stopped]] [[spoiler: [[MoralEventHorizon from ramming a space station with 9000 innocents]] and TheBigBad aboard]] by the Fury and her [[SapientShip ship's AI]] in a BattleInTheCenterOfTheMind.

* In GregoryHorrorShow, the HellHotel can only be found by people who have already begun to slip a little, and prolonged exposure to it breaks the guests more and more. [[spoiler:Both have completely lost their sanity by the end of the series.]]