The Flash: Can't [kill me], can you? I'm the last piece of your conscience. That's the one thing you'll never do.The Hero has been taking a turn for the Anti lately, exploring The Dark Side with the help of an Evil Mentor, learning anger, or generally indulging in less than heroic behavior or abilities. On the way, their friends will try to stop them, but the hero will ignore them because they're enjoying themselves too much. They're this close to Jumping Off the Slippery Slope thanks to Evil Feels Good and assorted perks to lapsing their morality, and just when it looks like they're about to Kick the Son of a Bitch and give him what's coming to him, they either miss the intended target and hurt an ally by accident, or abruptly realize they're being an abject Jerkass and attacking someone who's trying to help them for no good reason. They've just hit the nadir of this downward spiral and the start of their return to the straight and narrow. By hurting their friend, possibly the Morality Pet, Love Interest, or The Chick for extra oomph, they do the one thing capable of prompting a Heel Realization before they do a full Face–Heel Turn (or cement the turn, at least). Cue cries of "My God, What Have I Done?" and "What Have I Become?!?" while shedding Tears of Remorse and Cradling Their Kill, they'll say they're sorry and try their hardest to resuscitate the dog they've just kicked. If they weren't evil beforehand, whoever was inducing them to this behavior will quickly prove it by not turning back like the hero just has. They'll likely scold the hero for chickening out, thinking "They Were Holding You Back", and remark that evil does not spend its time petting bunnies (well, not during weekdays anyway). If powers are involved, expect them to go Drunk On The Darkside and/or One-Winged Angel. Compare Villainous B.S.O.D.. Also, some may be too far gone for this trope to pull them back to their senses, which will result in either an Ignored Epiphany or the character displacing the guilt onto someone else. See also Minor Insult Meltdown and Moment of Weakness.
Lord Superman: I've done a lot of things I thought I'd never do these last two years. One more won't hurt.
Lord Superman: I've done a lot of things I thought I'd never do these last two years. One more won't hurt.
— Justice League, "A Better World (Part 2)"
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Anime & Manga
- Dragon Ball Super: Beerus meeting Goku is the reason why he goes from an amoral, selfish God of Destruction who will destroy anything that annoys him, to being the overall Big Good in Super. However, Beerus has no problem reminding Goku that he is a god while he is just a mortal whose power can't compete with him or any God of Destruction. The most vicious kick he gives is when he mocks Goku for trying to stop Champa from killing his own team, saying that since Champa is a god, he can do what he wants in his universe, and there is nothing Goku can do to stop it. He also seems to agree with Champa that Goku and the others are pawns to the gods.
- Fullmetal Alchemist:
- Chapter 95: Roy is taking brutal revenge on Envy when Ed, Scar, and Riza step in to stop him. Roy asks Riza what she plans to do after she shoots him. The answer? Kill herself because it means she let him betray his own ideals. He backs down immediately.
- Greed, after killing a member of his old True Companions.
- An interesting inversion happens in Kill la Kill: when Ryuuko's resident Morality Pet, Mako Mankanshoku, starts letting the wealth and prestige of running the Fight Club go to her head, Ryuuko lets the morality pet kick her to bring Mako back to her senses.
- In Mahou Sensei Negima!, Negi went on a Black Magic fueled rage and indiscriminately attacked everyone around him. It was only after he came within inches of killing one of his own (defenseless) students that he snapped out of it.
- Happens to Agnes in The Familiar of Zero (at least in the novels), when Saito, Louise and everyone is fleeing the country to save Tabatha who is about to meet a Fate Worse Than Death at the hands of her uncle, the King of Galia. Anies had orders to only arrest the group and no intention of harming them, but as soon as she sees her lifelong nemesis Colbert responsible for her Doomed Hometown, whom she thought was dead, she snaps and opens fire. The shock from the realization she nearly killed Saito in the process, whom she trained and considered as a friend, has her realize that even if she killed her nemesis, other people would hate her in turn, so hatred and revenge are meaningless and that someone has to take it on himself to end the hatred here and now. She didn't forgive him, but is at least able, now, to look at his face without feeling murderous urges, or at least without acting on them.
- Kanaka in The World of Narue. A victim of Time Dilation, she's missed a couple of decades. After she realizes that everyone she knew is now completely different, she freaks out and tries to run off. Narue, determined to befriend her (technically older) sister, runs after her. Kanaka pulls a laser gun to try to frighten Narue off, and after a brief tussle, Kanaka completely unintentionally shoots her. Fortunately it was a non-lethal gun to begin with, but it's still enough to get Kanaka to thoroughly regret her actions. Well, that and some manly tears from Kazu.
- In GUN×SWORD, Michael, who has become a loyal minion of the Claw meets up with his sister, Wendy, one of the heroes. Wendy ends up shooting him in the arm to try and stop him, and he starts strangling her. Then, her pet turtle bites his finger and he snaps out of it, realizes what he's doing, and saves Wendy when the lair starts to collapse. While the series implies a Heel–Face Door-Slam for Michael and his lover Fasalina, who likewise snapped out of her loyalty to the Claw both appear to be crushed under rocks and averting Just A Fleshwound, Wendy's shot is implied to be fatal, supplemental materials go for Redemption Earns Life.
- In the Sands of Destruction manga, Morte finished her job in a city where the beastmen were eating humans. After berating Kyrie of doing something reckless, she blows up the entire city that they just saved for the fun of it. This action causes Kyrie to snap at her and he leaves the group which causes the group to split up (with Toppi and Naja going with him and Agan staying with Morte.) When he comes back, he throws the gun that she gave him to defend himself on the ground telling her that he doesn't need it anymore since he's not coming back. Cue, she snaps and attacks him proving Kyrie's point why he can't stay with her. Thankfully Toppi and Naja stopped her attack.
- Happens in Nabari no Ou when Gau throws himself in front of Raikou's attack to stop him from killing his own little sister, Raimei. Complete with Raikou cradling Gau and crying. They both get better.
- In Elfen Lied, Lucy brutally kills Kouta's sister Kanae in the middle of what's basically a mix of a psychotic breakdown and a hissy-fit of jealousy. While she's still murderous after that due to other unrelated events, quite a bit of guilt over said incident remains in her heart.
- Subverted in Durarara!!. Everyone assumes that Izaya did this to Shinra in middle school for no reason whatsoever. Turns out, he told Shinra to tell everyone that he stabbed him so he can use this opportunity to ruin Nakura who even dare hurt his Only Friend. Naturally, it's implied that Izaya also did this so no one will find that how close he is with Shinra.
- When Sakura sees Naruto's fox form for the first time, she tries to talk him out of it. Problem was that Naruto wasn't Naruto anymore; he was controlled by the Kyuubi, resulting in a horrifying 4-tailed state. To simply put it, he tail-slapped Sakura on the shoulder (badly) and tried to kill her while she was down.
- In Puella Magi Madoka Magica, as Sayaka begins her downward spiral, she ends up upsetting Madoka when she angrily lashes out at her for not using her incredible potential as a Magical Girl to aid her in the fight against witches. Unfortunately, this only makes Sayaka feel even worse, and she even rejects Homura's offer of a Grief Seed, given with the sole intent of preventing Madoka from being hurt by Sayaka turning into a witch.
- In Girls und Panzer, this is an unfortunate result of Maho adopting a Jerkass Façade toward her younger sister Miho, doing everything that is expected of her as heiress so that Miho can live her life her own way. When Miho confronts her about shooting an enemy flag tank that was trying to save her own team, Maho coldly dismisses her, leaving her in tears. When Miho against her typical nature, confronts her mother to ask her the same question, Maho realizes how much she has upset Miho and apologizes.
- In Hunter × Hunter, the Chimera Ant King has an epiphany re-affirming his identity as an apex predator. Deciding he no longer needs the distraction provided by Komugi, the blind girl he can't beat at a board game, he heads to her room to kill her. When he enters the room, he sees that Komugi has injured herself again...and immediately becomes concerned and tries to help her, all the while wondering why he is acting this way.
- In Attack on Titan, Reiner uses the massive strength of his Titan form to begin hurling Titans at the escaping soldiers and nearly kills several of his former friends in the process. It's used to illustrate just how far over the Despair Event Horizon he's gone and reaffirming his claims that I've Come Too Far. Armin even responds in shock, wondering aloud whether he even cares anymore about the danger of Eren being devoured by Titans. Hange later theorizes that killing Eren was his actual goal in doing this, having given up on simply kidnapping him.
- In Tokyo Ghoul, Kaneki's six-month Roaring Rampage of Revenge against Aogiri Tree comes to a halt when he manifests his Kakuja form for the first time and ends up impaling Banjou with his hand. After being given a Cool Down Hug, he realizes just how far gone he really is and begins a period of soul-searching. This leads him to decide to disband his group, and return to Anteiku so that he can attempt to make amends for his actions.
- In Magi – Labyrinth of Magic, Hakuryuu's attempt to conquer a second Djinn results in him being confronted with his conscience that appear in the form of his loved ones, with them telling him to put aside his revenge and accept his fate as it is. Angered at such a suggestion, while remembering all that he had suffered up until this point, he refuses and decides to fall into depravity instead. The first action that he does afterwards is to brutally cut down the illusions, while proclaiming that he will kill the real ones soon.
- In the Marmalade Boy anume, when Satoshi grossly misunderstands Namura's reasons to keep rejecting Meiko's love and beats him up, he ends up punching Meiko when she tries to stop him.
- In Villains United, Cheshire was blackmailed into joining the Secret Six with threats that a bomb was implanted in the back of her daughter's head. By the end of the miniseries Cheshire conceived a replacement child via seducing Catman. Neither Lian or her father Roy ever learned about this, which allowed Cheshire to continue her emotional manipulation of Roy long after Lian's death.
- Invoked in Starbrand & Nightmask when the Kree Starbrand murders her own Nightmask, knowing that Nightmasks are supposed to act as Morality Chains for their Starbrand. She's a Knight Templar who believes heavily in Utopia Justifies the Means, so she decided that having a moral lighthouse guiding her would just hold her back from doing her job.
- In the Pokemon fanfic Travels of the Trifecta, Paul does this twice, to both Reggie and Conway, and both times only realizes his mistake later on. With Reggie, it occurs in the first chapter, when Paul threatens to disown him if he loses to Brandon, which then starts the chain of events that leads to Reggie getting struck by lightning. With Conway, Paul abandons him after they get attacked by Team Galactic because Paul thinks that Conway is a traitor for "letting" Mars molest him, and stays angry at Conway until Reggie talks to him about it and Paul realizes that he shouldn't have abandoned Conway like that.
- In White Devil of the Moon, Precia Testerossa finally succeeds in reviving her Ill Girl daughter Alicia. Initially, Precia seems to revert back to the caring mother she once was, but Alicia eventually begins to notice signs of her mother's Sanity Slippage. It comes to a head when Alicia calls her out on her abusive treatment of Fate, and Precia loses her temper and hits her with a lightning spell. Fate responds by ventilating Precia's innards.
- In Pony POV Series, Princess Luna has a nightmare where during an argument with Princess Celestia, Luna casually kicks away the small annoying voice asking her to stop, then she turns around and finds she just caved in Pipsqueak's skull. She panics and tries to bring him back to life, only for Celestia to lecture her on the immorality of playing with life and death. When she wakes up, she realizes that she's grown an unhealthy attachment to the boy, and resolves to let him grow up on his own.
- Just like in the Animated Series, Spider-Man 3 has Peter Parker turn into a douchenozzle thanks to the alien symbiote turning him aggressive. He eventually goes on a date with Gwen Stacy (after getting dumped by Mary Jane), walks into the bar MJ is working at and proceeds to enter a song and dance meant to humiliate her. Finally the bouncer gets fed up and tries to throw him out. Peter easily deflects him, but also instinctively knocks MJ down when she tries to grab him. Peter suddenly realizes the symbiote is controlling him and tries to get rid of it.
- Parodied in both Ace Ventura and The Naked Gun: The protagonist is trying to convince the others that the Reasonable Authority Figure is actually a villain in disguise and Crosses the Line Twice while trying to prove it. In the case of Ace Ventura, he's actually right.
- Blade: Trinity starts with the vampires arranging a Kick The Wrong Dog moment for Blade: The "vampire" that he was chasing simply had fake teeth.
- At the end of Star Wars Episode III: Revenge of the Sith, Anakin Skywalker force chokes Padmé Amidala nearly to death when she tries to convince him what he's doing is evil. Unfortunately, the incident doesn't prompt him to stop, instead he just blames Obi-Wan Kenobi for turning her against him.
- X-Men: First Class includes a dramatic confrontation where Magneto is deflecting bullets from Moira MacTaggert trying to stop him from destroying the US and Soviet fleets. One of the bullets flies off and hits Charles in the spine. For a moment, there's a look of pure horror and guilt on Erik's face, then he decides it was Moira's fault. Xavier vocally disagrees and talks him down by playing on the other man's guilt.
- This is Albus Dumbledore's backstory in Harry Potter and the Deathly Hallows. He was dangerously close to joining with Grindelwald and his vision for the world when his sister Ariana was accidentally killed during an argument between him Gellert and Aberforth after Gellert tortured Aberforth for standing in the way and Albus ran to his defense. At that point he came to his senses and instead became the Big Good that he is known as.
- Also the story for Regulus Black. He was a loyal Voldemort supporter, proud to offer the use of his beloved House Elf...until he finds out that Voldemort wanted the elf to test the defenses around his horcrux, which involved the elf being horribly tortured and left to die. After he found out about that, along with deducing Voldemort's use of Horcruxes he gave his life to try to bring Voldemort down.
- And Severus Snape's. When he found out the information he provided would lead directly to Lily Potter's death, he switched sides. It was too late to save her, however, and he had to live with the guilt. This was not the first time this happened — back in his fifth year at Hogwarts, Snape, in a Moment of Weakness, called Lily (his best friend at the time) a mudblood. Their friendship, already strained from Severus surrounding himself with future Death Eaters like Lucius Malfoy, promptly dissolved after that. To this day he still considers it his absolute worst enemy, as it cost him at the very least the friendship of the woman he loved, and the day where the only path he saw left for him was the Death Eaters, all of which eventually led to Lily's death.
- In Dragon Bones, an ancestor of the protagonist killed a dragon. (Dragons are sentient in that setting, and it was his duty to protect them). He was called out on this by his slave Oreg, whom he had whipped so severe that it would have killed a mortal. (Oreg is immortal and cannot act against orders, the worst form of slavery. A Wizard Did It.) To make things worse, this ancestor is the same one whom the protagonist admires and tries to imitate, as he only knows about his better sides, such as establishing an anti-slavery law.
- In Les Misérables, Jean Valjean steals from a little boy from force of habit after the bishop pardons him. While the child wasn't someone he knew, how monstrous the act was, especially since it came immediately after the bishop had pardoned him, was what prompted his Heel Realization and finalized his transformation into a Messiah.
- In Gone, Caine's love/obsession for Diana was his one redeeming quality. But, in book four, he lies to her, uses her for sex, and brags about this to the entire town. This upset the fangirls more than when he sicced coyotes on preschoolers.
- This becomes subverted in LIGHT, when he abdicates the throne to rescue her, apologises to her, saves her from a life in prison and dies defending her.
- Nathaniel is much more innocent at the start of The Bartimaeus Trilogy, but a Cynicism Catalyst in a world of Black and Gray Morality soon leads him to leave that behind. By the third book he is Not So Different from the original villain. It's only when Kitty Jones is injured that he starts to see the implications of his actions.
- The whole M.O. of the Ministry of Love in Nineteen Eighty-Four is to force people to do this under threat of torture to break them.
- In The Count of Monte Cristo Edmond attacks innocent people- the family members of his nemeses- not because they've hurt him in any way in any way, but just to make his true enemies' despair that much more absolute. It's only once one of his closest friends commits suicide (because he, unbeknownst to Edmond, was in love with one of those innocents) that Edmond realizes how cruel he's become. Fortunately, there's still time to save most of his victims.
Edmond: Pray God that I have not already done too much.
- Angel does this (sorta) with Gunn and Wesley fighting over Fred, but when Gunn goes to hit Wesley, he accidentally hits Fred instead. Whoops!
- Whilst elsewhere in the Buffyverse, Willow's downward spiral of magic addiction is brought to a halt when she crashes her car with Dawn in the passenger seat while under the influencenote . Her manipulative friend Amy, who has been encouraging her magic abuse, is hurt by Willow's decision to quit magic and eventually becomes a Big Bad in the Season 8 comics.
Buffy: You're hurting the people who love you now?
- Later, when Warren fatally shoots Tara while trying to kill Buffy, Willow goes off the wagon again and absorbs a massive quantity of Black Magic, becoming Drunk on the Dark Side and flaying Warren alive. Her rampage doesn't stop there; she proceeds to go after Warren's accomplices, Jonathan and Andrew, considering them guilty by association, and doesn't hesitate to attack the other Scoobies from trying to stop her, going so far as to threaten to turn Dawn back into an Energy Ball and end her human existence just to put an end to her constant whining.
Willow: Only the ones in my way.
- Game of Thrones:
- On his return to King's Landing, Jaime goes so far low as to to force himself on Cersei, when they are right next to their son's corpse in the sept.
- The only reason the Dothraki tolerate Viserys is because he is their Queen's older brother. Any mercy he had from Daenerys or the Dothraki evaporated the second he threatened Daenerys' unborn child.
- In the Year Inside, Hour Outside series finale of Stargate SG-1, Daniel, having gotten fed up with what he thinks are Vala's intentionally shallow attempts at flirting and seducing him, lashes out with a nearly minute-long rant about her shortcomings that reduces Vala, who actually is genuinely attracted to him, to tears. It's especially shocking coming from Daniel of all people, but a close listen as his rant goes on reveals that he shifts from disparaging her actions to voicing his own insecurities and hesitancy about them having a relationship. And when a disturbed Daniel realizes both this and how badly he's hurt her, he quickly lets Vala know that he does return her feelings. They then decide to see if they can sustain a relationship, and you can guess what happens next. And considering that except for Vala's having a miscarriage , they spend the next fifty years together with no problems before Sam reverses time, apparently they work out any remaining issues.
- In the Saved by the Bell precursor show, Good Morning, Miss Bliss, one episode features Zack trying to join a club of popular jerks called the Rigmas. They tell him to start bullying his friends as part of his initiation. The biggest Kick the Morality Pet moment comes when he yells at Screech "Why would I want to be seen with a nothing like you?!" Thankfully, Zack later realized the error of his ways, and his friends forgave him. They together spend the last few minutes of the episode remarking on how stupid people often act in order to fit in with various groups. The episode ends with Zack symbolically dumping the bullies club membership jacket in the garbage while his friends give him the thumbs up.
- In the climax of Power Rangers Time Force, the Big Bad Ransik has trashed the rangers and is getting ready to finish them of, when his daughter Nadira (having gained an appreciation for human life after helping deliever a baby) tries to talk him down. He ignores her, and during the fight she gets caught in one of his blasts. Horrified at having nearly killed his own daughter, Ransik voluntarily surrenders himself to the rangers.
- In Breaking Bad Walt Slowly Slipping Into Evil is shown by his increasingly frequent mistreatment of Jesse and Skylar. By Season Five, only his children are safe.
- This is key to the Doctor Who Series 9 finale "Hell Bent", in which the Doctor temporarily becomes a Woobie, Destroyer of Worlds in the wake of Clara Oswald's death, which leaves him without a Morality Chain and then solitary imprisonment and torture by his enemies. In hopes of saving Clara's life, he risks destroying the entire universe by creating a Reality-Breaking Paradox, and most of those trying to stop him have No Sympathy for what he went through so it would seem no one can bring him around; the one exception is Clara herself but since that's the whole reason he's going to extremes...But then he tries to erase her memories of him with the intent of returning her to Earth. The objection to this is enough to make him realize he's invoked this trope and he returns to his best self, even accepting Mind Rape to excise the emotional cancer that made him so selfish.
- In Mindhunter, Bill and Holden interview Real Life spree killer Richard Speck, who has a pet bird he helped health a broken wing and fed with a dropper. When Speck is (soon) angered by Holden's questioning, he throws the bird into a moving fan.
- Subverted in BIONICLE. When Vakama turns evil and Matau attempts to turn him back, Vakama has no problem beating him up and almost killing him. Despite Matau's efforts and heartfelt speech, Vakama couldn't bring himself to believe that Matau had gone through Character Development, and thought he was the same Jerk Ass he had been when they last met, so he felt no remorse after hurting him. That is, until Matau managed to prove to him then and there that he has truly changed.
- Tales of Symphonia: Dawn of the New World: In the "bad" ending, Emil fakes his Superpowered Evil Side like he does on the other endings, but this time goes too far in his fight with Lloyd and Marta, and wins the fight, killing Marta. Raine rushes over to heal Marta. Emil promptly admits it was all an act, and in an act to redeem himself, he kills himself. Oops.
- Experienced at least twice by Kratos in the God of War Series, when he murdered his wife and child prior to the start of the series, and when he kills Athena while fighting Zeus at the climax of God of War II.
- In Jedi Knight: Mysteries of the Sith, this trope is invoked in the final duel of the game. As Mara Jade, you must holster your lightsaber and stop attacking Kyle in order to force him to have to kill you unarmed if he wants to reach his goal, thus snapping him out of it.
- Kingdom Hearts: Birth by Sleep has Terra experience this after nearly killing Master Eraqus while trying to protect Ven. Not at all helped by Master Xehanort finishing off the weakened Master Eraqus, who was also in the midst of a Heroic B.S.O.D. for raising his Keyblade against his students.
- Persona 5: During dinner, Makoto Niijima innocently mentions to her sister/legal guardian Sae that she believes their late father would have supported the Phantom Thieves. Sae already has a low opinion of their father and his ideals, especially since said ideas got him killed in the line of duty and left her to struggle with raising Makoto alone, and this promptly causes her to snap and verbally tear her younger sister a new one, going so far as to tell Makoto to her face that she considers her a useless burden, made even worse by the fact that Makoto does everything she possibly can to please Sae and lessen her burden. Sae instantly regrets saying it, but the damage is done.
- Fire Emblem Echoes: Shadows of Valentia has Prince Berkut sacrificing his girlfriend Rinea, aka THE person he cares for, to Duma as a part of a Deal with the Devil after Alm beats his pride into the mud and he learns that he was never going to inherit the Rigelian throne.
- Inverted in the second Ace Attorney Investigations: Miles Edgeworth game. Horace Knightley, the murderer of the first case, is a close friend of Simon Keyes, and pretty much the only person Knightley would be nice to. Simon is a False Friend that sets up his arrest and murder because he hates Horace as Horace's father killed Simon's... or so he thinks. It's actually the other way around, but he feels no remorse after learning about that fact.
- Drowtales: Ariel was heading toward the Anti-Hero/Anti-Villain grey area, but after accidentally killing a slave she became more of an Emotionless Girl, and more recently more of a Plucky Girl type. Because of this she ended up sparing an enemy and avoided directly killing someone else, though given the Crapsack World of the setting both of those choices may come back to bite her.
- Happens in the Webcomic Zap!, with the protagonist learning to use his forgotten Psychic Powers to control people.
- In the Secretary arc in Nature of Nature's Art, XZ "breaks up" with SV by quitting the college, and he goes into an Unstoppable Rage and kills her. Whether he did a Heel–Face Turn before he also died is up for debate.
- In Collar 6, Butterfly, aka Evita Kappel has one of these moments when she lashes out at her slave Gunther because he worries about her mental state. She immediately regrets it. Though she'd already been established as a villain, this also serves to back up Gunther's theory that her use of her husband's "black books" has started affecting her personality.
- It was this sort of moment, when she recklessly injures one of her teammates in a drunken stupor, that convinces the heroic Swallowtail of the Global Guardians PBEM Universe to seek help for her alcoholism.
- A strange mixture of in-universe and out-of-universe examples: in Twitch Plays Pokémon Crystal, the Mob accidentally releasing Togepi instead of Lazer Gator caused them to take stock of themselves, eventually leading to its new and distinct themes and plot.
- In the final season of Airbender's Sequel Series,The Legend of Korra, Kuvira's fiance Baatar Jr. is kidnapped by the heroes, who use him to try and convince her to leave Republic City. Kuvira decides the city is more important than him and nukes the site with her spirit cannon instead.
- Happened on an episode of Static Shock where a kid being remorselessly tormented by bullies brings a gun to school. Just as the kid was about to give up the gun the bully's idiot friends tackled him which made him accidentally squeeze the trigger and he winds up shooting Richie, one of the few people who had tried to be nice to him. The kid suffers a massive My God, What Have I Done?.
- A few episodes of Jimmy Two-Shoes has Heloise backing out of whatever evil she was doing because it was hurting Jimmy.
- In an episode of Transformers Animated, an upgraded Prowl beats (clone) Starscream. Unfortunately there's a lot of collateral damage - including a torn down tree and broken bird eggs that he earlier made an effort to protect. Seeing these, Prowl realizes what a total asshole he's being.
- Happened in The Spectacular Spider Man and Spider-Man: The Animated Series while he wore the black suit.
- Except in that long forgotten original comic storyline, where the suit didn't turn him evil at all ever, it just kept him up nights to act out more thrilling heroics: The Animated Series was actually the origin of the idea that the symbiote itself pushed its wearer to evil. The evil only started when the symbiote got dumped and reacted poorly. A Retcon was done later, indicating it made him aggressive. Other adaptations followed suit.
- Kevin from Ben 10 tends to do this whenever he goes insane due to absorbing alien energy. In the original series, Ben showed him kindness twice, and both times his reaction was to attempt to backstab him. Later, after reforming over the course of Alien Force, he gradually turns insane again, resulting in him hurting both Ben and Gwen, who have become his friends (and in Gwen's case, his Love Interest) at this point. 10-year-old Ben calls him out for it:
- My Little Pony: Friendship Is Magic: Discord has always had an utter disregard for the feelings of anyone else, and doesn't get snapped out of it until Fluttershy basically makes herself his Morality Pet by actually treating him as a friend. It's not until he realizes that his antics are driving her away that he finally grows some empathy.
- He did it again in the Season 4 finale, when he betrays Fluttershy to join Lord Tirek. Then he realizes how betrayed Fluttershy feels.