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->''"Kill them all... no... no, that's not ''me''... Help me! I'm scared of me..."''
-->-- '''Doc''', ''Machinima/RedVsBlue''

Maybe Bob saw an alternate timeline in which he was evil. Or maybe he sees an evil [[BeardOfEvil goateed]] twin indulging in his dark fantasies. Or maybe he simply sees a sordid side to his character gaining ground. Or maybe he meets an [[FutureMeScaresMe evil future time traveling version of himself]]. Or maybe he delivers ExtremeMeleeRevenge to a villain, but has to be dragged away and only realizes afterward that he [[KickThemWhileTheyAreDown kicked him while he was down]]. Whatever the case, he is horrified. He may attempt to nip a FaceHeelTurn in the bud (this [[YouCantFightFate may]] or [[ScrewDestiny may not]] [[SelfFulfillingProphecy backfire]]).

Sister trope to FutureMeScaresMe (where the future version doesn't necessarily have to be evil). Often a theme of uses of EvilTwin. One way a character may try to suppress a SuperpoweredEvilSide. See also OtherMeAnnoysMe.



[[folder: Anime & Manga]]
* ''Manga/{{Trigun}}'': Vash the Stampede seems to feel shades of this, among other things, toward his EvilTwin, the BigBad of the series. Especially in the manga, where their [[BodyHorror truly remarkable biology]] sets them apart more than in the anime and young [[MessianicArchetype Vash]] came a ''lot'' closer to going off the deep end, because Knives' StartOfDarkness was [[TheyWouldCutYouUp a]] [[StrappedToAnOperatingTable lot]] [[GoMadFromTheRevelation more]] [[HumansAreBastards justified]].
* In ''Manga/{{Inuyasha}}'', Inuyasha is afraid of his full demon state, mainly because it could threaten the life of his LoveInterest and puts humans in danger as well.
* Similarily to the above example, Ichigo Kurosaki from ''Manga/{{Bleach}}'' is afraid of his [[SuperPoweredEvilSide Inner Hollow]] taking over, as he transforms into an [[TheBerserker out-of-control]] but extremely powerful monster.
* Creator/JunjiIto has written a series involving an OrdinaryHighSchoolStudent named Oshikiri who finds out that his house is a portal to an AlternateUniverse, and the other Oshikiri has found a way to cross over. The problem is, the other him is a serial killer...
* ''Manga/MissKobayashisDragonMaid'': Only three days after her HeelFaceTurn, Ilulu is shown to be genuinely disturbed when reminded of her former AxCrazy personality.

[[folder:Comic Books]]
* Comicbook/{{Supergirl}}:
** Pre-Crisis Kara was frightened of Satan Girl, a duplicate of hers who was more powerful, evil, ruthless and extremely conniving.
** [[ComicBook/Supergirl2005 Post-Crisis Supergirl]] was split into her normal self and an evil alternate personality when exposed to black Kryptonite. Supergirl was frightened of her dark, violent and murderous self because "Dark Supergirl" claimed she was the real Kara, and Supergirl's kind and well-meaning persona was only an act.
* ''Comicbook/CaptainAmerica'': Steve Rogers faces his worst nightmare in ''Comicbook/SecretEmpire'': [[spoiler:himself as a fascist.]]
* ''ComicBook/MightyMorphinPowerRangers'': The BigBad of the first arc is [[spoiler: an alternate universe version of [[SixthRanger Tommy]] who chose to stay on Rita's side after the mind control was broken, eventually conquering Earth with her]]. [[spoiler: Tommy]] is more than a little concerned that it might be a matter of time before [[spoiler: he]] becomes the same.

[[folder:Fan Works]]
* In the ''MyLittlePony'' fanfic ''Fanfic/RiseOfEmpressMidnight'', [[spoiler: [[BigBad Empress Midnight]] is the alternate version of Twilight Sparkle.]]
* In the Harry Potter/Torchwood crossover, ''[[http://www.fanfiction.net/s/7151727/1/The_Magic_Of_Torchwood The Magic of Torchwood,]]'' de-aged Jack is frightened by his - admittedly distinctly unnerving- worst possible [[FutureMeScaresMe future self]], portrayed by a boggart (it is explained in-universe that boggarts are very intelligent, it's just rare that a fear is strong enough for them to show it and take a sentient form) though Jack being Jack, he considers it to be good company.
* ''FanFic/LegendOfZeldaSacredReliquary'': Ganondorf of all people - the latest reincarnation regained his past lives' memories and regrets everything. [[spoiler: An EldritchAbomination called the Nameless uses it against him by taking the form of Dark Beast Ganon.]]
* In ''ComicBook/{{Supergirl}}'' story ''Fanfic/HellsisterTrilogy'', Satan Girl is the Girl of Steel's evil duplicate, her dark side's embodiment. Kara is ''terrified'' from her.
* ''FanFic/InnerDemons'': Twilight Sparkle is horrified when she uncovers a prophecy that seems to foretell her becoming an UltimateEvil and taking over Equestria. After discovering the prophecy, she's plagued by BadDreams about being consumed by her inner darkness, one of which opens with seeing herself proclaim her rule to the terrified citizens of Ponyville. [[spoiler: Eventually, however, the darkness consumes her, and she becomes the thing she feared.]]
* Nia in ''FanFic/TengenToppaGurrenSolvernia''. Up to chapter 18, she was a MessianicArchetype, [[spoiler: then [[DoomedByCanon Kamina]] [[BreakTheCutie dies.]] And the effect of his death on her is so bad that, adding to the depression, she [[SanitySlippage develops]] an evil SplitPersonality inside her mind that manifests as a sentient shadow resembling an [[FutureMeScaresMe older version of her]] as its shape that wouldn't lose any opportunity to get free.]]
--> '''[[spoiler:Shadow!Nia:]]''': "Look at it! Look at what you are capable of! Look at how you killed them: the beastmen who dared to oppose you, your so-called friends who held you back, all of them dead at your hand. ''[[EvilFeelsGood And you enjoyed every second of it.]]''"
* In the ''Film/StarTrek'' fanfic ''Fanfic/WrittenInTheStars'', both the Fem!Kirk of the Alt Reality and the Fem!Kirk of the original timeline take a look at their counterpart from the Alternate Reality of the Mirror Universe. Younger Jane's reaction is this trope.
-->''I don't think I like this other reality...''
* In the ''Series/StarTrekTheOriginalSeries'' fanfic ''FanFic/{{Insontis}}'', Spock goes into a brief HeroicBSOD when he realizes that it was his [[MirrorUniverse alternate-universe]] [[Recap/StarTrekS2E4MirrorMirror self]] who {{mind rape}}d [=McCoy=], horrified by the thought that he could be capable of such things in any reality.
* In ''TabletopGame/Warhammer40000'' fanfic ''Fanfic/ReturnOfThePrimarchs'', many Primarchs have this reaction. Good-Horus is terrified of what Chaos-Horus did and when Fulgrim faces his daemonic self, he has a HeroicBSOD which Ferrus must [[GetAHoldOfYourselfMan pull him out of]].

[[folder:Film - Live Action]]
* We see a touch of this at the climax of ''Film/ReturnOfTheJedi'', as Luke stops himself from finishing his CurbStompBattle against Darth Vader.
* At one point in ''Film/AnAmericanCarol'', Michael Malone sees an alternate timeline where the South won the UsefulNotes/AmericanCivilWar, and he is a slaveholder who out-Legrees [[Literature/UncleTomsCabin Simon Legree]].
* In ''Film/SilentHill'', [[spoiler: Sharon is initially horrified watching her evil side, Dark Alessa, slaughter the church full of cultists with telepathically controlled barbed wire]]. The director has stated that, when she stops being frightened, [[spoiler: this is a sign that her two sides have fused together again]].

[[folder:Film - Animated]]
* In ''Film/MyLittlePonyEquestriaGirlsLegendOfEverfree'', Twilight Sparkle's human counterpart fears that her newly awakened magic will lead to her becoming Midnight Sparkle once more.

* Rachel of the ''Literature/{{Animorphs}}'' goes through a process with results practically identical to Kirk in ''Series/{{Star Trek|The Original Series}}'''s "The Enemy Within" with a split into aggressive and passive personality characteristics, each with their own flaws that get counterbalanced with the other strengths and with the passive side being frightened of the aggressive violent tendencies of the other.
** As the series goes on, Rachel (no longer split) gets more and more worried about her emerging BloodKnight tendencies.
* In the ''Series/DoctorWho'' Literature/EighthDoctorAdventures, future alternate Fitz, now known as Father Kreiner, scares Fitz. Being a SadClown DeadpanSnarker, he pretends not to take him seriously:
-->''I am the real Fitzgerald Michael Kreiner and I claim my five pounds.''[[note]]If you don't get [[http://en.wikipedia.org/wiki/Lobby_Lud#Lobby_Lud_in_popular_culture the reference]], it's probably because Fitz is a FishOutOfTemporalWater. And if you do, you may be unaware it wasn't coined to describe {{Internet Mimic}}s and is [[OlderThanTheyThink Older Than You Think.]][[/note]]
* Commander Vimes in ''Literature/{{Discworld}}'' has The Beast. It's made clear in several of the books that the reason he's [[TheFettered so devoted to the rule of law]] is horror as to what he might do without it.
** Granny Weatherwax is this way too. Nanny Ogg explains that Granny is so good "because she's got Granny Weatherwax staring over her shoulder all the time".
* In ''Literature/HowToLiveSafelyInAScienceFictionalUniverse'', [[AuthorProtagonist Charles Yu]] says that peering into parallel universes, 35 of the other versions of himself (out of 39) were assholes. He mentions that if that many alternate versions of you are [[{{Jerkass}} jerks]], you're probably not hot stuff yourself.
* In ''Literature/TheDresdenFiles'', Bob the Skull's personality is heavily dependant on who has ownership of him at that time. With Harry, he's a sex obsessed, heavily snarky [[MrExposition exposition centre]]. He is therefore ''terrified'' of what he was like when he was owned by the (now deceased) {{Necromancer}} Heinrich Kemmler, and has no interest in returning to that state of mind. Which is seriously saying something, because Bob barely understands the concept of morality, so when he says someone is bad, ''they're bad.''
--> ''“Bob, would you be willing to take on Evil Bob?"''
--> ''"I'd... prefer not to. I'd really, really prefer not to. You have no idea. That me was crazy. And buff. He worked out.”''
** Harry himself has met his subconscious a few times, and their conversations fit the trope as well. Subconcious!Harry even has a BeardOfEvil, though he's less evil than impulsive. Both of them tend to reject [[spoiler: Lasciel's]] attempts to subvert them.
* At one point in ''[[Literature/TheNameOfTheWind The Wise Mans' Fear]]'', Kvothe is poisoned with a substance that lowers his inhibitions (in an attempt to get him to flunk his exams and have too high a tuition to stay at the University). He correctly diagnoses it, runs to the infirmary, and gets himself a moral touchstone - someone whose judgement he trusts, because he doesn't trust himself until the stuff gets through his system. Based on his remarks under the influence, he was ''completely right''; he talks about [[BreadEggsMilkSquick mundane activities, science, sexual assault, and murder]] in the same emotionless tone of voice.
* From the ''Literature/NewJediOrder'' series, Tahiri, though she only heard her DarkMessiah BadFuture self described by her best friend/love interest Anakin Solo after he had a vision of her rather than encountering her herself. Considering that [[ScaryDogmaticAliens Yuuzhan Vong]] [[MadScientist Shapers]] had tried to turn her into one of their species (and partially succeeded), Tahiri is ''right'' to be afraid of what she might become. Her relationship with her Yuuzhan Vong EnemyWithin Riina ultimately subverts this one- Riina's a bloodthirsty ProudWarriorRaceGirl, true, but she's also a scared, emotionally-damaged girl who's spent ''years'' trapped alone in Tahiri's subconscious. Tahiri eventually learns to empathize with Riina, and ends up pulling a SplitPersonalityMerge that may have averted the above BadFuture - or might be the first step in its fulfillment. [[AbortedArc We'll probably never know]].

[[folder: Live Action TV]]
* ''Series/AgentsOfSHIELD'' has a situation like this be PlayedForDrama. [[spoiler: After Leopold Fitz returns from the Framework, an alternate reality simulation in which he was a cruel sociopath known as The Doctor, he suffers severe PTSD and crosses the DespairEventHorizon because his actions within caused the deaths of two real people - innocent civilian Agnes Kitsworth and SHIELD's own Director Mace. Fitz is forced to grapple with the fact that he himself did those things, and "not some other man or a decoy" (because the Framework's altered circumstances created a role of an evil Fitz whom he was forced to be, with no memory of the real world while inside). His fellow teammates are very forgiving, but it's pretty clear that Fitz is going to need some time to recover from the experience.]]
** The Framework arc also provides us with [[spoiler: a good Grant Ward]]. This version hates the actions his real-world self has taken and wants to prove that he's nothing like his counterpart. [[spoiler: He's like this because he was recruited by Victoria Hand, a genuinely nice person, instead of John Garrett, who is a ManipulativeBastard HYDRA sleeper agent with extreme narcissism and no regard for life other than his own. The tragedy here is that Grant Ward ''really could have'' been the good agent he pretended to be, had he actually had an inspiring mentor instead of a toxic one. Some of what he did wasn't just pretending or manipulation, as this Ward proves that the real Grant Ward had ''some'' good in him all along.]]
--> [[spoiler: Good!Ward]]: I would hate you to think that I'm anything like the [[spoiler:Grant Ward]] you knew over there.
* ''Series/DoctorWho'':
** In the story "The Ultimate Foe", it turns out that [[spoiler:the Valeyard]] is an embodiment of the Doctor's darkest aspects, from somewhere after his twelfth incarnation, without any of the Doctor's virtue or morals, pure unbridled darkness. The Doctor is not happy.
** In "Amy's Choice" the Dream Lord, the creepy villain of the episode is [[spoiler: the collection of the Doctor's darker side.]] Chillingly, the Doctor figures this out because, in his own words, "only one person in the universe hates me as much as you do".
** In "The Waters of Mars," the Doctor finally has enough with the universe screwing him over, and declares that the laws of time are ''his'', and they will obey him as he tries to save a doomed crew of astronauts from a terrible fate. The power trip makes him sound like his archnemesis the Master, and he's finally snapped out of it and realizes the horror of what he was becoming when [[spoiler: his companion from the episode commits suicide to keep time on the right track]]. He grapples with the temptation again in the following episode, but overcomes his demons by sacrificing his current life and triggering a regeneration to save the life of a friend instead of saving himself.
* ''Series/BuffyTheVampireSlayer'':
** Willow Rosenberg. Although the thing that actually horrifies her is more the fact that she seems [[ScrewYourself into her,]] and "skanky".
** Later episodes seem to have Willow using call-backs to Evil!Willow's mannerisms, particularly when she goes on her RoaringRampageOfRevenge.
--->"[[PreMortemOneLiner Bored now.]]"
** She also feels this way about her own [[TheDarkSide dark side]] in Season 7.
** This is very much a running theme of the series. Faith is so disgusted with herself after she turned evil she wants to die. Buffy breaks down when she discovers how much like Faith she had become. Giles would very much like to keep the things he did as [[FormerTeenRebel Ripper]] buried, thank you. Angel has that curse that makes him feel regret over the things he did. And part of the reason Spike hates Angelus is because of how much of a monster he made him.
* ''Series/StarTrekTheNextGeneration'': One of Data's earliest encounters with emotion was feeling hatred when fighting the Borg. The fact that this first emotion of his was a negative one and that he apparently enjoyed indulging in the furious killing of an enemy disturbed him. Then we get his EvilTwin Lore turning up who embraces his negative emotions and so personifies them to Data (and is in fact the cause of Data's sudden unleashing of emotion). Data would probably have been scared of him, if fear hadn't been saved for a later episode.
* ''Franchise/StarTrek'' has a decent history of {{Evil Twin}}s, what with [[PhlebotinumBreakdown transporter accidents]] and the MirrorUniverse. There's the example of Kirk being a LiteralSplitPersonality with an aggressive, hot headed side and a passive, weak-willed but logical side and the passive side is afraid of the aggressive one. Major Kira Nerys of ''[[Series/StarTrekDeepSpaceNine Deep Space Nine]]'' gets a similar deal to Willow in the Buffy example. However, since the MirrorUniverse normally involves plots of being swapped with the guy on the other side (presumably to avoid having to deal with one actor being in a single scene) mostly you get the counterparts never meeting and at most Evil You Scares [-(but sexually intrigues)-] Me. Or in ''[[Series/StarTrekDeepSpaceNine Deep Space Nine]]'''s version, their opposite is usually dead on one side of the mirror or the other. However, Kira interacts a ''lot'' with her EvilCounterpart (though [[ScrewYourself not to the extent]] the evil counterpart [[AnythingThatMoves would have liked]]).
* In ''Series/StarTrekDiscovery'', timid and {{Adorkable}} Cadet Tilly is horrified to find out her mirror universe counterpart is a brutal, vicious murderer who made it to captain by KlingonPromotion.
* In ''Series/TwoAndAHalfMen'', Alan worries in the episode "The Price of Healthy Gums Is Eternal Vigilance" that he may have unconsciously shoplifted a Silly Putty egg when he was nine, and has spent his life struggling to keep Bad Alan under control. He hasn't considered the alternative (true) explanation that [[spoiler: his brother Charlie planted the stolen Silly Putty in his pocket, assuming that goody-goody Alan was less likely to be caught]].
* While under the influence of [[http://en.wikipedia.org/wiki/Ibogaine ibogaine]] in the ''Series/{{Nikita}}'' episode "Echoes", Alex [[spoiler:hallucinates a version of herself that had defeated Division and regained control of her family's company Zetrov]]. She had become a Machiavellian CorruptCorporateExecutive. She later remarked to Nikita that the possible future scared the hell out of her.
* A variation happened in ''Series/PowerRangersLostGalaxy''. Karone had thought at that point that [[SuperPoweredEvilSide Astronema]] was gone forever, but it wasn't ''quite'' true. After Leo lost his powers to Magnetox, she remembered a powerful warrior who had a weapon that might restore them... A warrior that Astronema had [[TakenForGranite turned to stone]] after killing his tribe. Nonetheless, she and Leo went to the site of the battle, where the spirits of the dead forced her to battle a spiritual replica of Astronema to prove the evil within her was truly gone. The spirit of her evil self didn't truly ''scare'' her, but it would be wrong to say this was easy; she defeated it, but Leo was almost killed in the process.

[[folder: Role-Playing Games]]
* Near the end of the FinalBattle of ''Roleplay/DinoAttackRPG'', [[spoiler:once Rex stops and realizes that he has [[JumpingOffTheSlipperySlope given in to madness]], [[NotSoDifferent much like Dr. Rex before him]], he becomes terrified of what he has become.]]

* In ''Toys/{{Bionicle}}'', an alternate-universe Makuta Teridax who never turned against Mata Nui enters the main universe to confront the BigBad who is just about on the verge of winning. It's not so much "Evil Me Scares Me" so much as "Evil Me Has To Die".

[[folder: Video Games]]
* In the DLC chapters of ''VideoGame/AlanWake'', "The Signal" and "The Writer", Alan is stuck in the Dark Place as a result of the events of the main game, and has been split in two personalities, a rational and self-determined part, whom the player controls, and an insane and self-destructive part, who has gained control over the world and can shape it to his will. The former is at first very disturbed by the latter, but it later turns into disdainful annoyance as the Dark Alan keeps making up more and more absurd and contrived hindrances to slow his progress towards sanity. [[spoiler: The story of the DLC is that the Dark Place drives you insane if you don't have something to focus on. At the end of The Signal, Alan manages to re-merge his insane and sane sides, only to almost immediately go insane again and split for The Writer. It's not necessarily that the insane side is self-destructive, it's that the Dark Place is unknowable, and trying to concentrate on it makes you crazy.]]
* A major reveal in ''VideoGame/BioShockInfinite'' [[spoiler: is that Booker [=DeWitt=] is, in fact, an alternate version of the game's BigBad, Zachary Comstock. This affects him enough that he chooses to go back in time and kill himself to prevent the horrors of the game from occurring.]]
* ''VideoGame/InjusticeGodsAmongUs'': {{Franchise/Superman}} has to defeat his EvilTwin from an alternate reality. [[spoiler:The alternate Superman [[FallenHero became evil]] when ComicBook/TheJoker tricked him into killing Lois Lane and his unborn child and destroying Metropolis. Later, Superman admits that he could have turned out the same as his alternate self had he experienced the same loss.]]
* In the ''VideoGame/AssassinsCreedIII'' DLC ''The Tyranny of King Washington'', the events of the DLC turn out to be a vision generated by a Piece of Eden to show what would happen if Washington claimed its power for himself. Washington is so horrified by the tyrant he becomes in this alternate timeline that he begs Connor to throw the Piece of Eden into the sea to prevent anyone from ever taking it. Later, Washington is tempted by a voice in his own head suggesting that he become king of the newborn United States of America, but he rejects it.
* ''VideoGame/BatmanTheTelltaleSeries'' has Harvey Dent, the persona of Two-Face. [[spoiler: Although it is possible to stop the facial scarring that brings Two-Face's iconic look]], it is not possible to prevent a LiteralSplitPersonality within Dent: One is his normal self and the other is a cruel, violent man lashing out at the problems he sees in Gotham - including Harvey, who he views as "weak". Good Harvey is terrified of this dark personality, and at one point, begs Bruce not to leave him alone with the voice.

* In ''Webcomic/{{Sinfest}}'', [[http://www.sinfest.net/view.php?date=2010-09-19 Fuchsia]] has this reaction to her reflection after losing her temper with Seymour. In all likelihood, this was a side of herself she never wanted Criminy to see.
** After getting mindwiped, [[spoiler:Lil' E]] also has this response.
* In ''Webcomic/ElGoonishShive'', Grace stops attacking Damien when she [[http://www.egscomics.com/?date=2004-05-03 notices her blood stained hand and its resemblance to her memory of Damien's hand after he killed all those people in the lab where she was born.]] She is startled (and seems to come to the conclusion that [[IfYouKillHimYouWillBeJustLikeHim if she kills him she will be just like him]]) and [[ApologeticAttacker apologizes]] to him.
* Hannelore from ''WebComic/QuestionableContent'' is definitely freaked out by the evil version of her seen in an ImagineSpot in [[http://www.questionablecontent.net/view.php?comic=2443 this comic.]]
* ''Webcomic/TwoKinds'': Trace Legacy is horrified at who he was before his amnesia (mass-murdered 400,000 [[PettingZooPeople Keidran]] and sent 100,000 humans to the slaughterhouse), so he has resolved to stop trying to cure himself before his split personality kills his new girlfriend (and son). Sadly, there appears to be a THIRD split personality that is all magic-crack addict and no WellIntentionedExtremist that feeds off the naïve amnesic personality.
* ''Webcomic/{{Homestuck}}'':
** Dirk feels "haunted" by alternate versions of himself who seem to inevitably go bad -- such as his [[AIIsACrapshoot sinister, manipulative AI clone]] and his alternate universe adult self who became an AbusiveParent to Dave (this one is also arguably an example of FutureMeScaresMe, since Bro represents the person Dirk could grow up to be if he doesn't watch himself).
** Played with by Meenah, when she first hears about all the atrocities her alternate universe self the Condesce performed, her first reaction is happiness so profound that she sinks into a brief coma. Later she learns what the Condesce [[PoweredByAForsakenChild did to the Psiionic]], the alternate universe version of the mentally-handicapped Mituna, and she suddenly [[EveryoneHasStandards finds herself disturbed and horrified]].
* ''Webcomic/{{Lackadaisy}}'': Calvin is a shy, quiet, kind young man who wants to be a police officer. [[AxCrazy He also goes a bit doolally when faced with violence.]] He is terrified of what he does when he slips into this mode, especially since AxCrazy mode got him kicked out of the police academy and drove him to [[spoiler: violently kill the pig farmers that attacked the Lackadaisy]].

[[folder: Western Animation]]
* Happens repeatedly with several characters in ''WesternAnimation/JusticeLeague'' after the titular heroes encounter their WellIntentionedExtremist counterparts known as the Justice Lords.
** A similar thing happened in ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'' when they meet their completely evil counterparts.
* In ''WesternAnimation/AvatarTheLastAirbender'' Aang actually says, "I was scary" when reflecting on the Avatar State. A little different since the Avatar State isn't evil but rather an implacable force of nature.
* ''WesternAnimation/DannyPhantom'': In "WesternAnimation/TheUltimateEnemy", Danny's future self, who crossed the DespairEventHorizon after his friends, family, [[MyFriendsAndZoidberg and teacher]] were killed. After Danny absorbs Vlad Plasmius's ghost half and goes on a ten year long rampage, Danny's present-day self is brought to the future and is horrified at what he's become.
* WesternAnimation/FamilyGuy: When Brian accuses Stewie of getting soft, Stewie decides to maximize his evil side. It backfires, kind of: he ends up creating a separate, wholly evil Stewie. He isn't happy once he sees what the clone is capable of.
* In ''WesternAnimation/{{Ben 10}}'', Ben is shown to be scared of his Ghostfreak form several times. [[ProperlyParanoid This turns out to be completely justified]].
* In ''WesternAnimation/TeenTitans'', this seems to be the case with Plasmus. Actually a symbiote, while his original form is human, he involuntarily transforms into a large purple ooze monster whenever he is awake. Thus, whenever he is in custody, technology is used by the authorities to keep him asleep. And given what he says the first time he appears, he's ''terrified'' of what he turns into, and is willing to stay asleep forever if that's what it takes to avoid it.
* In keeping with tradition, Harvey Dent (later Two-Face) in ''WesternAnimation/BatmanTheAnimatedSeries'' is horrified at what his vengeful personality does [[SplitPersonalityTakeover when it has control]].
* ''WesternAnimation/TurtlesForever'': The [[WesternAnimation/TeenageMutantNinjaTurtles1987 1987 series Shredder]] is scared absolutely shitless of his [[WesternAnimation/TeenageMutantNinjaTurtles2003 2003 counterpart]], the Utrom Shredder. Not without reason -- the Utrom Shredder is easily the most dangerous and insane incarnation of the Shredder in the history of the franchise -- [[spoiler:he nearly destroyed ''all of reality'' to kill the Turtles, ''willingly'']]. Only [[WesternAnimation/TeenageMutantNinjaTurtles2012 one other incarnation]] comes even remotely close to his level of menace, and he appeared in the series ''after'' this movie.
* In ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', Celestia meets her [[AmbitionIsEvil ambitious]], sister-resenting inner side [[DreamWalker in a nightmare]] and does not immediately know how to deal with it.