* Occurs a few times in ''Fanfic/TheLionKingAdventures'':
** Simba loses all hope after the [[spoiler: death of his parents and the destruction of the Pride Lands in Series Four. He gets over it, though.]]
*** Similarly, he loses hope again in ''The End'' when [[spoiler: the Writer kills all of his friends, including the love of his life, Nala.]]
** Haiba [[spoiler: for a brief while after he murders Tama.]]
* In ''FalloutEquestria'' The Massacre at Littlehorn, which involved the slaughter of an entire school of foals, signaled the end of any peaceful solutions to the Great War and sent Celestia over the DEH, stepping down as ruler and letting Luna take over
** And after the war, Raiders are ponies who have been driven over the DEH by the blasted, inhospitable Wastes, losing all hope in everything and simply becoming agents of the brutality of the Wastelands, killing, torturing, raping, any pony they get their hooves on.
* In ''FanFic/AeonNatumEngel'' many people cross the horizon when the Migou sends their ACTUAL Warships (those Swarm ships that is nearly equal to standard NEG Ship? A mere gunboat by Migou Standards), and then the Migou themselves cross this line when Moloch shows up.
* In ''FanFic/TheDeathOfPrincessLuna'', Princess Celestia [[spoiler:''and'' Luna]] suffer this; the former suffering this having seen Luna's [[spoiler:fake]] body in the Everfree Forest, and [[spoiler:Luna thinking that nopony would save her from her captors planning to execute her]]. [[spoiler:This is all averted when Twilight Sparkle and her friends find and rescue Luna and present her to Celestia, creating a heartwarming and tearful reunion]].
* In the ''FanFic/OneiroiSeries'', Redcloak rockets past it when [[spoiler:his insane daughter rapes and kills him]].
* In the pro wrestling story, ''FanFic/ARingOfTheirOwn'', this is the reason given for Molly Holly's retirement from WWE in 2005 (the story takes place in the kayfabe world) after getting her head shaved at WrestleMania 20 plus the losing streak and humiliation conga she went through afterwards. Only after a substantial amount of arm-twisting from her best friend, Ivory, does she agree to come out of retirement and join the new all-women wrestling company, the FWF.
* In the ''[[WesternAnimation/AdventuresOfTheGalaxyRangers Galaxy Rangers]]'' fanfic ''Chrysalis,'' the [[GodSaveUsFromTheQueen Queen of the Crowns]] shoves Zach over the line. He is ForcedToWatch as she tortures his team in front of him and [[spoiler: faking an execution of Niko]] while he is kept in a well-appointed prison. He attempts suicide. She forces her medical staff to keep him alive, explicitly stating that he's not going to do anything unless ''she'' wishes it. The final blow is a BattleInTheCenterOfTheMind where she brutally overpowers him by [[BreakingSpeech pointing out his failure to save his wife, the League, or his Rangers]]. To save what little is left of his sanity, he goes into an AngstComa.
* In FanFic/TheSecondTry, Shinji and Asuka are forced to this line ''[[PeggySue a second time]]''; the latter when going against Arael again, the former when he thinks Asuka is dead. [[spoiler:Thankfully, this gets averted both times.]]
* Vampire mate bonds and werewolf imprinting are said to be strong enough to cause this in ''Fanfic/{{Luminosity}}''. The actual trope is commonly avoided, as the vampire either commits suicide offscreen or becomes TheUnfettered, but when [[spoiler:Edward]] thinks that he's lost [[spoiler:Bella]], all he does is ask to die.
* The VillainProtagonist of the ''Franchise/MassEffect'' fanfic The Council Era endured this when he [[spoiler: witnessed his wife's death on a news network. As part of his grief, he destroyed his entire clutch, except one, who soon after hatched. When the same soldiers who killed his wife, and were searching for him (he'd gone AWOL) surrounded his home, Tyrin threatened to kill his one hatched child and then himself.]] There's also a potential AlternateCharacterInterpretation that his criminal actions in the story are because he's caught in a state of perpetual despair following his wife's death, and is taking it out on the world.
* In Fanfic/RevengeRoad, Hikaru returns to Japan for an audition as a last effort to get Kyosuke to notice her, and then seemingly meets Kyosuke, who appears to have grown distant from Madoka, there. She fails the audition and learns that the Kyosuke she was with was a fake, then snaps and [[IfICantHaveYou kills Kyosuke]] [[MurderTheHypotenuse and Madoka]].
* Finally crossed by Mao in Fanfic/CodeGeassMaoOfTheDeliverance after a TraumaCongaLine that would have made [[TheDeterminator anyone else]] give up a long, ''long'' time ago, and which he rides all the way through TheLastDance.
* In FanFic/TouhouTonari this is what happens to [[BadPowersGoodPeople Yuyuko]] when she realises that her power has grown so powerful that it may kill [[TimeAbyss Yuk]][[RealityWarper ari]] and it eventually lead to her [[DrivenToSuicide suicide]].
* The plot of FanFic/DecksFallEveryoneDies takes place after the worst possible thing that could happen to the ''Franchise/YuGiOh'' world: the fall of CardGames.
* In ''FanFic/StarsAbove'', [[spoiler:[[Manga/LuckyStar Kagami]]'s going over this line will cause TheEndOfTheWorldAsWeKnowIt. In an AlternateUniverse, [[ApocalypseHow it's already happened.]]]]
* Rainbow Dash comes dangerously close to crossing it in ''[[{{Fanfic/AceCombatEquestriaChronicles}} Ace Combat: The Equestrian War]]'', but luckily, Medley manages to [[GetAHoldOfYourselfMan snap her out]] of her HeroicBSOD.
* ''FanFic/InnerDemons'': Pinkie Pie and Fluttershy both shoot past it after [[BigBad Queen!Twilight Sparkle]] cements her FaceHeelTurn by using them in a SadisticChoice against Rainbow Dash. In Fluttershy's case, it's so bad that [[spoiler: she actually attempts to [[DrivenToSuicide kill herself]]]].
* Too many to count in FanFic/TheUnitySaga. In fact, the Empire systematically imposes these on a number of Starfleet officers and others.
* So many characters in ''Manga/{{Bleach}}'' fic FanFic/WinterWar have either [[MyGodWhatHaveIDone crossed the line]] or are [[BreakTheCutie dangerously close]], it's almost impossible to keep track. [[TearJerker Far too understandable]], given the TraumaCongaLine that is [[CrapsackWorld their world]].
* Par for the course in ''FanFic/AHistoryOfMagic'', considering it's a ''Anime/PuellaMagiMadokaMagica'' fanfic, and if all the examples were listed we'd be here all day, so let's look at the one unique one that happened [[spoiler: in the ''post-''Madoka world. Homura kills Mitsuko in cold blood after she murdered Madoka's younger brother. Homura could not forgive herself for killing a fellow Magi, and believed herself beyond redemption. Had this been a pre-Madoka world, Homura would have become a witch. For most magi in the post-Madoka world, they'd just disappear. Homura becomes an Angel, a witch who retains her memories of her past life.]]
* In another PMMM fic, ''FanFic/ToTheStars'', in the Post-Madoka future during the Battle of Epsilon Eridani the magical girls and the normal human soldiers defending the colony world were brutally savaged by the aliens, and were about to cross the DEH, but avoided doing so when Homura Akemi, ironically, crossed her own: As her Soul Gem was practically pure-black from magic exhaustion, she pretty much resigned herself to die, something she was actually looking to since it means reuniting with Madoka. Except Madoka didn't want Homura to die, and so the latter was denied her wish, which pushed her over the edge, turned her normally angelic wings into dark-twisted wings as seen at the end of PMMM, and practically wins the battle by herself, and goes into self-exile afterwards.
* In FanFic/AGrowingAffection, Minato's death pushes Gouki from avoiding the ninja world and helping the civilians who live nearby, to deciding to take over the world and enslave all ninjas to his will, so he can force them to put the rest of the world first.
* ''[[Fanfic/AFutureOfFriendshipAHistoryOfHate A Future of Friendship, A History of Hate]]'': In Episode 5, Scootaloo ends up in a HeroicBSOD after [[PlotRelevantAgeUp her wish]] ends up [[BeCarefulWhatYouWishFor blowing up in her face]], at which point [[spoiler: said BSOD releases the woebeghoul from the [[ArtifactOfDoom Tear of Covet]], and allows it to consume her to power itself on her sorrow while it destroys Ponyville]]. When she realizes it's all her fault, she crosses the horizon, giving up and even saying it would be better if she was never born. It takes a BigDamnHeroes moment and RousingSpeech from Rainbow Dash to bring her back to normal [[spoiler: and together they destroy the woebeghoul]].
* In [[http://www.fanfiction.net/s/9758731/10/Gensokyo-20XXI-The-Outside-World Chapter 8]]of Gensokyo 20XX, Yukari's reached this when her search for Ran, Chen, and Flandre left her empty handed, leaving her heartbroken and so upset with herself that not only did she feel she was unable to return to Reimu (to whom she had left behind to make sure she won't be captured) her frozen tears enclosed her in a cocoon of ice and she remained in that state for a couple of chapters, stating she was entombed in her cocoon of ice for a long time.
*** Be noted in said chapter, she also figured Reimu probably died during the time she was searching for Ran, Chen, and Flandre, meaning she felt she had ''nothing'' to go back to.
* Aang and Co. seem to be nearing this after Zuko and Azula attack the Western Air Temple in {{FanFic/TheMasksWeWear}}.
* [[TragicHero L]] is implied to have crossed this in ''Fanfic/StoryOfTheCentury'' by the end: [[spoiler:[[PyrrhicVictory he gets what he set after in the beginning--to solve the case and to have Kira executed--]][[BreakTheHaughty but he loses Watari, as well as the]] WorthyOpponent [[BreakTheHaughty he had and the friend he could have had in Light, Misa's friendship, the task force's trust and respect, and of course his own life.]] [[ShooTheDog A girl he liked leaves him]] [[BreakHerHeartToSaveHer hating his guts so much]] that [[PartingWordsRegret her last words to him]] are a long and vicious TheReasonYouSuckSpeech in which she all but outright states that she hates him, and [[YourDaysAreNumbered he spends the rest of his days]] [[DyingAlone cooped up in HQ all alone.]]]] His [[BreakTheHaughty unusually graceful response to her speech]] is heart-wrenching, even to her; more so when it's implied that [[MyGodWhatHaveIDone he was already]] [[IAmAMonster aware of how badly he'd screwed up]] before she lashed out at him...
** What makes his reply even sadder is that it sounds like a callback to his declaration when he meets the task force earlier on in canon that JusticeWillPrevail and that he would "win the war" in spite of being childish and a sore loser. But this time, [[spoiler: he's essentially admitting that the opposite happened BECAUSE he was being childish, just around the time the task force take Erin home and leave him for good.]]
* In the VideoGames/Left4Dead2 fanfic "Fanfic/BlindMansBluff", Nick very, very nearly crosses this when he believes that [[spoiler: Ellis was tortured to death by Jerry.]] He's in such deep grief over that that he has a [[HeroicBSOD brief shutdown.]]
* Chapter 14 of ''FanFic/{{Pokeumans}}'' largely concerns Brandon crossing this after the death of a very close friend and then slowly coming back over it.
* In ''FanFic/MegaManDefenderOfTheHumanRace'', [=ProtoMan=] crosses this post episode 10 [[spoiler:due to torture]], becoming a shell of his old self.
** Mega Man crosses it in episode 11, chapter 8, shattered over the trauma he's suffered.
* [[TheSlenderManMythos In the Slender Man fic]] ''Fanfic/ByTheFiresLight'' Jared Holloway despairs of every being free of the Slender Man and [[DrivenToSuicide ends up taking his life.]]
* In the [[MyLittlePonyFriendshipIsMagic MLP]] fanfic ''Fanfic/WhatHaveYouDone''. Twilight does this after her friends abandon her at the Canterlot Wedding rehearsal [[spoiler: but Chrysalis unlike in canon, [[ForWantofANail just leaves Twilight instead of sending her to the caves]], seeing as how Twilight was already in the depths of despair.]] Twilight leaves the wedding dejected [[spoiler: ''frees Discord'', and the Mane 6 and Twilight's mother find her Element of Magic ''pitch black''.]]
* ''WebAnimation/{{RWBY}}[[FanFic/RWBYReckoning : Reckoning]]'': After being called out for wearing the uniform of the [[YourTerroristsAreOurFreedomFighters White Fang]], [[AuthorAvatar Darrel]] accidentally reveals the truth about himself. He reflects on the [[ForWantOfANail changes to the plot]], and deduces that they all lead back to [[ItsAllMyFault his presence.]] Coupled with the fact that [[VoiceWithAnInternetConnection Kim]][[TheMentor ba]] had taken him from his home, [[YouCantGoHomeAgain without any guarantee he could return]], and thrown him into [[AdventureFriendlyWorld Remnant]] for [[SecretWar a war no one knows or cares about]]... well, put simply, he finally crumbles.
* [[spoiler:[[ManipulativeBastard Mercury]] ]]does this at the end of the InheritanceCycle fanfic [[https://www.fanfiction.net/s/9470346/1/From-the-ashes-a-fire-shall-be-woken From the ashes a fire shall be woken]] after [[spoiler:[[MoralityChain Kligharrah]] ]]dies. As seen later, this made him lose his will to live, [[spoiler:[[MilesToGoBeforeISleep but not before vowing to]] ''[[UtopiaJustifiesTheMeans correct]]'' the world that had taken Kilgharrah from him]]. As seen subsequently in [[https://www.fanfiction.net/s/9998018/1/Phoenix-fire Phoenix-fire]], this means [[OhCrap Oh Crap]] [[TakeOverTheWorld for the rest of the world.]]
* Poor TCB!Big Macintosh in FanFic/TheConversionBureauTheOtherSideOfTheSpectrum. His grandmother died, his homeland went to war, his sister suddenly [[NotHimself turned into a genocidal murderess]], he was forced to accept the use of TechnicallyLivingZombie slave labor on his farm, and [[BreakingTheFellowship much of his family isn't on speaking terms with each other.]]
-->I'm tired of it all, tired of whatever it is that's happened to Equestria. I've seen too much happen to Equestria to call it the same land I grew up in, and it's hollowed me out like an old Nightmare Night pumpkin.
-->I want my sister back and all I have is a monster with her face, a damn caricature that looks for all the world like her but has none of her soul inside. I want to tell her how I feel but I cower away like a foal away from her eyes. Eyes that no longer have that stubborn but warm love and care; just hatred and wrath for anything that goes against Queen Celestia and the so-called 'greater family and herd'.
* In the [[http://www.fimfiction.net/story/47607/the-lost-element The Lost Element]], James is driven over the line after experiencing [[spoiler: [[ManipulativeBastard Discord]]'s corruption of all his friends, while not knowing that they could be restored.]] While at first he is merely confused by the behavior of his friends, he then starts to worry. He finally loses it when [[spoiler: Fluttershy makes an ultimatum where she will leave him for not being tough enough if he doesn't punch himself in the face with his strength boosting gauntlets on, and then make a cut in his neck using his sword]]. This causes him to not just break down, but to all but [[spoiler: go insane, tricking Discord into a dual to the death where he dismembers Discord, eats his wings, rips the Elements of Harmony out of his chest, and generally kicks the utter humanity out of him until he is dead]]. Due to earlier events, all his friends see it and James finally has his moment of sorrow. This is made even worse by the fact that the author put the story on hiatus right after this chapter was completed, stating that he would continue the fanfiction once he was finished an alternate ending fic where James succumbs to his wounds after the battle. Given the fact that Humanity writes huge chapters, the main storyline won't be getting an update for a while.
* In ''FanFic/TheEndOfEnds'', [[spoiler:Beast Boy crosses it sometime after running away, which prompts the Dark Prognosticus to come and lend him his power...]]
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