History Main / NotHimself

* In ''[[WoodyAllen Everyone Says I Love You]]'', one of the characters becomes a Republican to the great surprise (and dismay) of his family. It turns out it was because of some sort of brain problem. Subtle, we know.

* During the "Trinity" arc, it is revealed that Superman, Batman and Wonder Woman are "Keystones" of reality, inherent to the fabric of the universe, and that the endless Expies of them across the multiverse are the "Keystones" of their universe (including [[TheAuthority Apollo, Midnighter]] and [[WildCATs Zealot]] for the {{Wildstorm}} universe, whch makes... [[{{Grimdark}} a lot]] [[NinetiesAntihero of sense]]). When a trio of villains tries to usurp their position for ultimate power, the spell they use has the side effect of of causing them to take on each others personality traits, meaning on a mission to the MirrorUniverse, Superman goes LeeroyJenkins and [[CurbStompBattle Curb Stomps]] the [[EvilTwin CSA]] while Batman tries to negotiate a peaceful solution and Wonder Woman broods on their out of character behaviour. Then when Superman sends Ultraman, Owlman and Superwoman out of their universe, it starts trying to force them to become the new Keystones, and they start acting like their CSA doubles as well as each other. Fortunately BlackCanary tells them to go home and get their act together.

* Usagi and Mamoru in ''SailorMoon'' most likely because the other is involved in some way.

** In the ''Series/StarTrekTheOriginalSeries'' episode "Amok Time", Spock's uncharacteristic emotional outbursts are the first clue that something is [[MateOrDie seriously wrong with him]].

* ''WesternAnimation/Ben10UltimateAlien'': When Ben has to be in three different places at once, he becomes Echo Echo and then reverts back into 3 of his human forms (one [[JerkAss arrogant]], one "[[AmbiguouslyGay sensative]]", and one [[ManChild immature]].) At first everyone rolls with it, [[NiceJobBreakingItHero until they find out what's really going on]], [[WhatTheHellHero to which they promptly chew him out for it]], leaving for one of the few DownerEndings in the series.

* In ''[[WoodyAllen Everyone Says I Love You]]'', one of the characters becomes a Republican to the great surprise (and dismay) of his family. It turns out it was because of some sort of brain problem.
** [[UnfortunateImplications Nice...]]

* In DeadOfSummer, [[spoiler:[[Music/TheProtomen Panther]]]] falls under this. At first he seems normal (and awesome), though breaking a bad guy's finger may raise some eyebrows. But later on, he [[spoiler: [[EyeScream tears out Dr. Light's eyes]], kills him, and proceeds to reveal that he's [[FaceHeelTurn in league with the Big Bad.]]]]

* Happens a lot in ''{{Stargate SG-1}}''. Between the Goa'uld, mind control, robots, clones, and other random behavior changes, the characters get a pretty good taste of this.

* This happens twice in ''{{The X-Files}}'', once in "Small Potatos" that involved a shape-shifting man, and another in "Dreamland", where Mulder switches bodies with an Area 51 worker. Both Non-Mulders try their hand at seducing Scully.

* ''WebAnimation/{{RWBY}}'': When Professor Ozpin gives the induction speech to the academy's new students, his speech is oddly clipped, one-note and lifeless. Ruby and Yang both notice something seems to be wrong and that he doesn't seem to sound or act like himself. Ruby even exclaims "It's like he's not even there!".

[[folder:Webcomics]]

* ''{{Utena}}'' after having lost a duel.

* Briefly in the ''DannyPhantom'' episode "The Ultimate Enemy" where Danny's [[FutureMeScaresMe evil self]], Dark Danny, goes to the past (present time) and disguises as his old fourteen-year-old self. His friends wonder what's up with him when he starts speaking rather eloquently, but being a [[ConsummateLiar smart bastard]], Dark Danny quickly fixes this and their suspects drop.

* In the ''JusticeLeagueInternational'' comic, Guy Gardner spends a rather extended period like this after minor head trauma, courtesy of [[Franchise/{{Batman}} one punch]]. The abrasive, chauvinistic, arrogant Guy turns into a sweet, Sensitive Guy -- who really exists deep down, as exhibited when Guy falls in love. This trope is partially subverted, though, because the League ''likes him better as Sensitive Guy'' and therefore makes no effort to return him to his previous state.

* In episode 105 of ''VideoGame/SamAndMaxFreelancePolice'', you find yourself in a virtual world where four computers are in charge, each one controlling a certain setting (pop-ups, height control, gravity and three-dimensional view). In order to progress you need to place a bug on each one of them at one point or another, with the side effect of completely reversing their personalities. An old Atari console who communicates through beeping and booping lets out nothing but a flat monotone, a smarmy, conversational telephone's voice gets hacky and hoarse, an aggressive arcade machine starts belting out showtunes and an outdated Osborne 1 starts spouting youth slang.

* In episode 105 of ''VideoGame/SamAndMaxFreelancePolice'', you find yourself in a virtual world where four computers are in charge, each one controlling a certain setting (pop-ups, height control, gravity and three-dimensional view). In order to progress you need to place a bug on each one of them at one point or another, with the side effect of completely reversing their personalities. An old Atari console who communicates through beeping and booping lets out nothing but a flat monotone, a smarmy, conversational telephone's voice gets hacky and hoarse, an aggressive arcade machine gets the personality of a peaced-out hippie and an outdated Osborne 1 starts spouting youth slang.

* On ''Series/House of Anubis'', when Fabian and Alfie become sinners, everyone is scared because they are acting like total jerks, when in reality they are two of the nicest people in the house.

[[folder:Film]]

* In ''[[VisualNovel/FateHollowAtaraxia Fate/hollow ataraxia]]'', the fact that many of the characters are nothing like they were in ''[[VisualNovel/FateStayNight Fate/stay night]]'' is actually an early clue that something's wrong with this reality besides the whole GroundhogDayLoop thing.

* A [[TearJerker tearjerking]] example occurs in ''WesternAnimation/{{WALL-E}}'': [[spoiler: EVE repairs WALL-E after he's been crushed to death. However, once he's started up again, WALL-E has no memories of EVE, and his personality is gone. He's just another trash-compacting robot. EVE especially notices he's not himself when he regards all the trinkets he's collected over the centuries as just more trash, and is completely indifferent to the cockroach he adopted as a pet.]] Fortunately, [[spoiler: he gets better]].

* On ''House of Anubis'', when Fabian and Alfie become sinners, everyone is scared because they are acting like total jerks, when in reality they are two of the nicest people in the house.