->'''Katara:''' What's going on with you? In the desert, all you cared about was finding Appa, and now it's like you don't care about him at all.\\
'''Aang:''' You saw [[FoeTossingCharge what I did out there]]. I was so angry about [[BerserkButton losing Appa]], [[UnstoppableRage I couldn't control myself]]. I hated feeling like that.\\
'''Katara:''' But now you're not letting yourself feel anything. I know [[HopeIsScary sometimes it hurts more to hope]], and it hurts more to care. But you have to promise me that you won't stop caring. C'mon, you need a hug.\\
'''Aang:''' Thank you for your concern, Katara. ''(he walks away without returning the hug)''
-->-- ''WesternAnimation/AvatarTheLastAirbender''

Heroism is hazardous work for both the body and the mind: it's fairly common for heroes to end up facing at least one emotionally, mentally, or [[MindRape psychically]] charged event capable of causing a [[HeroicBSOD Heroic Blue Screen Of Death]] that temporarily renders them catatonic. Of course, this wouldn't be a gripping New York Times Best Seller if it didn't happen at the worst possible time to ramp up the tension as the audience is left hoping the SideKick can protect the hero until he or she snaps out of it.

Keeping the computing metaphor, some heroes have a hardier Operating System than the norm, which when faced with the HeroicBSOD instead enters [[TitleDrop Heroic Safe Mode]]. During this period the hero "shuts down" non-essential thought processes and focuses entirely on "fight or flight", hoping that when the danger is over they can "restart" in safety. Especially strong willed heroes who go into Safe Mode while loved ones are in danger will usually [[HeroicResolve protect them]] to near suicidal extremes. In other cases, they may wind up snapping at their own friends who try to push them ''out'' of Safe Mode. Luckily, these loved ones can usually push the restart button with a CooldownHug. They will (at ''best)'' [[TerseTalker talk in monosyllables]], become either [[TheStoic completely]] [[TranquilFury emotionless]] or [[UnstoppableRage absolutely enraged]], but they will always, ''always'' terrify friend and foe alike with an unfiltered DeathGlare. When a hero fully reboots from this mode back into their standard operating procedure, PostVictoryCollapse usually kicks in, or the full-on HeroicBSOD may kick in after the direct danger to the hero and/or their companions has passed.

Where this gets interesting is if the hero has a SplitPersonality or AdaptiveArmor that is not normally in the driver's seat. With the hero "out to lunch", the passenger may decide to take survival into his, her or ''its'' own hands (neurons?) and control their body until the hero is well again. This varies depending on the nature of the SplitPersonality. For example, a soul bound EmpathicWeapon might default to ''AttackAttackAttack'', while a more evil EnemyWithin might decide it's a good time to unlock the hero's SuperPoweredEvilSide.

Once they reboot, they may well regret having not helped save someone, run away, or killed many dozens of {{mook}}s... [[GetAholdOfYourselfMan but as friends will remind him]], at least he (and they) are still alive.

This is TruthInTelevision to a greater degree than a lot of SplitPersonalityTropes. Many forms of disturbed personality deal with their pain by creating a kind of secondary self who is less bothered by the pain, because this self is just observing while "that other self" is actually experiencing the pain. This function may be the reason for the existence of the RealLife, non- HollywoodPsychology phenomenon of people who have a SplitPersonality.

In a less extreme form, it is considered a healthy coping mechanism. People using this strategy to deal with dangerous or otherwise overwhelming situations will often say to themselves something like, "I have to focus on survival right now. I'll deal with these feelings later." This is different from repression, because the person is not trying to forget or suppress emotions, only to delay dealing with them until it's safe to do so. People capable of shifting focus away from their own emotions, without suppressing them, are often very resilient; so this is a trait often seen in characters whose professions often take them into emotionally charged situations--soldiers, emergency workers, spies, police, superheroes, and similar.

See also SuperpoweredAlterEgo, DefenseMechanismSuperpower, and ItNeverGetsAnyEasier.


[[folder:Anime & Manga]]
* In ''Anime/{{Naruto}}'', before the battle versus [[spoiler: Pain, Naruto asks Tsunade if Kakashi is on a mission or... Tsunade says nothing, Naruto understands and goes into HeroicSafeMode]]
* In ''Anime/YuGiOh'', [[SuperpoweredAlterEgo Yami]] usually takes over whenever Yugi is in trouble in the early manga and anime. Later on, Yami appears more often because Yugi is more conscious of him.
* Judai seems to live in this mode in Season 4 of ''Anime/YuGiOhGX'' after crossing the DespairEventHorizon last season.
* In ''{{Gundam 00}}'', [[SociopathicHero Hallelujah Haptism]] tends to take over when Allelujah is [[HeroicBSOD impaired]], or otherwise unable to complete his mission.
* As a suit of biological PoweredArmor, the ''{{Guyver}}'' has this trope as a safety feature. If the owner receives catastrophic brain damage, psychic attack, or emotional trauma, the suit goes into a killing frenzy to protect them while it [[HealingFactor restores their grey matter]]. Poor Sho though, has this happen while [[spoiler:fighting his BrainwashedAndCrazy dad]].
* ''Manga/{{Bleach}}'': [[SuperpoweredEvilSide Hollow Ichigo]] comes out whenever Ichigo is too injured to suppress him, first during the fight with [[spoiler: Byakuya Kuchiki]] and later during a fight with [[spoiler: Ulquiorra]]. During the latter fight, [[spoiler: Ulquiorra puts a hole in Ichigo's chest which would normally kill him outright, but Hollow Ichigo surfaces instead]]. Good news: [[spoiler: "Wasn't there a hole in my chest?" (It healed.)]] Bad news: [[spoiler: "Did I do that?" (He's skewered his ally, Ishida.)]] Can be seen as a CallBack with [[spoiler: a DownerEnding]] to his fight with Byakuya; [[spoiler: Ichigo calls the fight unfair and does the final blow against Byakuya.]] However, when his hollow surfaces in his fight with Ulquiorra... [[spoiler: Ulquiorra dies before Ichigo can get his fair fight, even if it would mean he would end up crippled to get one.]]
* ''LightNovel/ACertainMagicalIndex''
** The eponymous Index has a literal safe-mode installed into her, that activates anytime the main consiousness goes down. The computer analogy is quite literal. The safe-mode even shouts out status messages.
** Touma in his fight with [[spoiler:Vento, in which he was being trashed around up to the point where they were next to one of the people he wanted to keep safe. When one stray shot that would have killed a few dozen civilians was blocked by the person he wanted to protect, we discover that he was worried sick about collateral demage and wasn't fighting at full capacity.]]
** At the same time, Accelerator was fighting Amata Kihara. In the course of that fight, [[spoiler:Accelerator was left without the collar that enabled use of his powers and should've been rendered a brain-damaged wreck. Instead he kept getting up, attacking, and woke to even greater power than he'd had before to finish Kihara.]]
* ''VideoGame/ZoneOfTheEnders''. Dolores is generally a [[TheDitz ditzy]] HumongousMecha, but danger reverts her back to her factory settings as an amoral, ruthlessly efficient killing machine. Jehuty is the opposite: She starts out with factory settings when [[KidHero Leo]] [[FallingIntoTheCockpit falls into the cockpit]], but gains personality as the story progresses.
* Ranma of ''Manga/RanmaOneHalf'' starts acting like a cat when overwhelmed by his [[WeaksauceWeakness fear of cats]]. While this is usually PlayedForLaughs, it is also dangerous because he retains his old strength but [[CatsAreMean doesn't care about pulling his punches anymore]].
* Delf of ''LightNovel/TheFamiliarOfZero'' is of the EmpathicWeapon variety, and can do this for his wielder, Saito, using magic he has absorbed to forcefully move his body when he is too injured to move on his own.
* [[spoiler:Akemi Homura]] of ''Anime/PuellaMagiMadokaMagica'' goes into a long-lasting one of these after seeing [[spoiler:all her friends die horribly and/or destroy the world, [[GroundhogDayLoop repeatedly]]. She only acts emotionless because she doesn't want a HeroicBSOD to get in the way of protecting Madoka from [[{{Faust}} Kyubey]]... That and Heroic [=BSODs=] usually lead to worse things in the Madokaverse, especially if you're a Puella Magi.]]
* In ''Manga/{{Berserk}}'', Guts goes into heroic safe mode after he accidentally kills the Count Julius's son Adonis during his assassination. After he stumbles into the sewer when he gets away from the guards, he's "rebooted" back into the HeroicBSOD.
** He's pretty much locked into heroic safe mode (if not an actual HeroicBSOD) after the horrible toll that the Eclipse took on both him and Casca. After spending two years on a bloodthirsty vendetta against Griffith, the bastard responsible for it all, he becomes obsessed with finding a cure for Casca's post-Eclipse insanity, even after he's warned that she may not want to be cured.
* Yu from ''Anime/Persona4TheAnimation'' goes into this in ep 23 after [[spoiler:Nanako's death]]. Seeing the normally [[TheStoic calm]] and [[NiceGuy gentle]] Yu wearing [[http://3.bp.blogspot.com/-pBR80ez_Zts/T2O8wzJuIAI/AAAAAAAAAgU/HUcxPa3IHfs/s1600/ScreenHunter_59%2BMar.%2B16%2B18.17.jpg this expression]] while being both figuratively and ''literally'' inches away from [[spoiler:killing the guy responsible by tossing him into the TV world]] is terrifying to say the least. It's only after everyone calms down and goes home for the evening (save for Yosuke) that he finally breaks down crying.
* In ''[[Lightnovel/SwordArtOnline Sword Art Online II]]'', Kirito gets approached in Gun Gale Online by a player who has a Laughing Coffin tattoo, which {{trigger}}s memories he had repressed of [[ShootTheDog killing a couple of Black Coffin members back in SAO]]. He briefly [[HeroicBSOD shuts down]], but he's in the middle of a tournament so he has to move. In his next several fights he charges straight at his opponent without much apparent thought.
* Potentially deconstructed in ''Anime/TengenToppaGurrenLagann''. After [[spoiler: Kamina's death, Simon enters a somewhat berserker state in battle, done in an attempt to channel Kamina and attempting to function as a person and moving on. However, the deconstruction comes from the fact that his delaying in coping with his grief is unhealthy, taking a severe toll on his physical and mental facilities (it's implied that he has been neglecting sleep and not eating as much while also more aggressive.) The lack of help from any of the team makes it worse. Simon is ultimately worked through the grief thanks to Nia's help and eventually finds the confidence to move forward once more.]]

* In the recent "BatmanRIP" storyline the hero was a victim of a psychological attack, but survived because he had auto-hypnotized himself into having a "backup personality" -- named [[ContinuityNod the Batman of Zur-En-Arrh]] -- that would take over in such a case. Talk about being CrazyPrepared.
** To extend the computer metaphor, the Zur-En-Arrh personality is so single-mindedly focused on crime fighting that has been described as "Batman on DOS." We also do see a bit of Bat-Mite so it is wondering how sane this Batman is (though given what Bat-Mite said, there is possibly no one right answer.)
** In ''ComicBook/{{Knightfall}}'', [[ComicBook/{{Azrael}} Jean-Paul Valley]] enters this with The System after the Scarecrow douses him with Fear Gas. However, there's one small problem: it ''stayed on'' afterwards and drove Jean-Paul mad.
* [[SpiderMan Spider-Man]] has gone into these on several occasions. One implied example is in the classic issue #33[[note]]the one where he's trapped under a machine when the building is flooding; you know the one[[/note]]; at one point, Spidey lets himself get beat up so that he can gather his strength, then unleashes a flurry of hits on a bunch of thugs who are attacking him. He eventually realizes that he's no longer hitting anything, and that everyone's knocked out. This kind of thing only happens when one has entered into HeroicSafeMode.
* IronMan's is built into his armor. The AI takes over when Tony becomes unresponsive and pilots the armor to safety. It is also capable of fighting.

* In the Bleach/Fairy Tail crossover fic ''Protector of the Fairies'', this happens to Ichigo after he unintentionally kills someone for the first time. Gildarts later runs into him on the way back to the guild, and he's still [[HeroicBSOD minimally responsive]].

[[folder:Films -- Live-Action]]
* ''Film/{{Serenity}}'': [[spoiler:Zoe's response to Wash's death . She was in no way paralyzed with fear. Her response when everyone else asked where he was reeked of "must focus on the matter at hand, my emotional state is not important right now." It seems that she was determined almost to the [[DeathSeeker point of suicide]] during the climactic fight, since she [[TheSlowWalk casually walks away from cover]] straight toward the waves of oncoming Reavers while firing her shotgun. The DVDCommentary says JossWhedon and Gina Torres, Zoe's actress, argued about it. She felt Zoe would be more angry, and Joss explained that Zoe was [[TranquilFury suppressing it right up until the aforementioned point]].]]
* ''Film/StarTrekInsurrection'' reveals that Data has a literal Heroic Safe Mode. When in specific failure modes, his ethical subroutines take over control, leaving him in a state where the difference between right and wrong is the only thing he is capable of acting on.
* And in ''Film/StarTrekFirstContact'' he has acquired the ability to toggle his emotion chip, keeping him from freaking out in combat the way he did in ''Film/StarTrekGenerations''.
-->'''Picard:''' Mr. Data, there are times I envy you.
* [[ActionGirl Sarah Connor]], in ''[[TheTerminator Terminator 2]]'', spends a good chunk of the movie this way, after the events of the first film. It's only after [[spoiler:she [[MyGodWhatHaveIDone nearly kills an innocent man in front of his wife and son]]]] that she snaps out of it and lets herself feel like a normal person again.

* In ''Literature/DragonBones'', Ward mentions that he acts like his (cruel, abusive) father in combat. It's a part of his playing different roles all the time. When he's fighting, he's his father. When he's giving orders and the like, he's his famous, heroic ancestor Seleg.[[spoiler: Which causes problems, as Oreg, now Ward's friend, has been a slave to all of Ward's ancestors since castle Hurog was built, and was mistreated by Seleg. Oreg goes into flashback mode, because Ward's acting like Seleg triggers him, and accuses Ward of killing the dragons, until Ward manages to snap him out of it.]] Somewhere inside, there's a scared boy who just wants himself and his siblings to be safe and happy, but that's not easily achieved.
* [[Literature/TheLegendOfDrizzt Drizzt Do'urden]] the Dark Elf, of several different books... no unnatural factors, but while his normal personality is pacifistic and compassionate, he will -- if pushed too far -- turn into "The Hunter", a beastlike personality he developed from decades living alone in The Underdark, one of the most lethal, monster-infested areas in the world. While Drizzt is driven by morals and ethics, The Hunter is driven entirely by survival instincts -- he'll attack anything threatening with all the strength at his disposal, flee from an enemy who proved too strong, and not care one whit about others... This is explained in all of the [[TabletopGame/DungeonsAndDragons official]] [[AllThereInTheManual materials]] that show the RPG mechanics of the universe the character is based in - he took a level in Barbarian during his time in The Underdark, a class that has UnstoppableRage as one of its features.
** Must be a retcon - Drizzt was conceived well before 3rd edition, which was the first system under which that would have been possible.
* In Creator/JohnCWright's ''[[Literature/TheGoldenOecumene The Golden Age]]'' and ''The Phoenix Exultant'', Phaethon uses his "emergency persona" -- a high-speed unemotional persona developed by him for space accidents, but quite useful when he's under attack, too.
* This is what certain characters in Robert Jordan's ''Literature/TheWheelOfTime'' series call "Assuming the Void." (or, alternatively, "The Oneness.") All emotion and feeling is pushed aside so the individual can focus on the situation at hand without being impaired by "minor" things such as taking a mortal wound or seeing someone they love get critically injured or killed.
* In the story ''EternalChampion'', after Ekrose promises the Queen he will destroy all of the Eldren (whom he has come to respect far more than humanity), he becomes an emotionless, remorseless killing machine. Socially, none wanted to be with him, but all (humans) were glad to have him leading them in battle.
* Gifted individuals in the ''SwordOfTruth'' series can partition their mind, which allows them to protect the core of their sanity against unbearable agony while sacrificing everything else. In the first book, [[spoiler: Richard Cypher uses this technique to endure repeated torture from a Mord-Sith, Denna]].
* ''Literature/KieshaRa'': When Araceli [[spoiler: [[Literature/KieshaRa takes away Andreios]]]], Danica's reaction is described by Zane thusly:
-->"Danica?" I touched her arm and felt trembling beneath my fingertips. She did not respond, not yet.\\
Now Nacola hurried into the room and knelt beside her daughter. "Shardae?"\\
Danica balled one hand into a fist for a moment, shaking... and then relaxed as with a conscious effort. She took another deep breath, and suddenly I felt her force back the grief that had been rising -- force it back and lock it tightly away.\\
As if I was suddenly struck blind, I lost her; she hid her soul from me even more carefully than she had when we had been enemies conversing for the first time.\\
She lifted her head finally, smoothing her hair back with her hands. For a moment, her face was vacant of expression. Then I saw the blankness drop, and it was replaced by a casual facade that was even more disturbing.\\
"Well," she said, without a tremble in her voice.\\
She shook her head, cutting me off. "There was nothing we could do."\\
This calmness frightened me more than any blade I had ever faced....
* Tobias of the Literature/{{Animorphs}} is a boy living in the body of a hawk, and he experiences the mind of the hawk as well as his own. The hawk is much freer from the problems of anxiety and sadness than humans in general [[TheWoobie or the human Tobias in particular]] (even physical pain doesn't bother the hawk as much as it would a human), and the hawk mind is perfectly capable of carrying on the normal functions for a hawk body. So for Tobias, allowing the hawk to be the dominant personality is a highly useful coping mechanism.
* Vimes from ''Literature/{{Discworld}}'' has what he calls "The Beast", which is his instinctual sense of self-preservation writ large and leads to this trope. He spends most of his time trying to override it, because he knows nothing causes PoliceBrutality better than someone in full 'fight' mode at a bad time.
** The Beast gets a power-up later when Vimes becomes host to a ''Main/SuperPoweredEvilSide'' "the Summoning Dark", an entity of pure revenge, which causes Vimes to kill an army of attacking dwarfs wielding flamethrowers and battleaxes.
* Creator/JohnSteakley's ''Literature/{{Armor}}'' has the main character create what he calls "The Engine" in order to survive being repeatedly dropped into combat where he is out-numbered thousands to one. As Felix puts it, the Engine "is a remarkable creature. It was a wartime creature and a surviving creature. A killing creature. The Engine is not me. It will work when I cannot. It will examine and determine and choose and, at last, act. It will do all this while I cower inside".
* In ''Literature/AtlasShrugged'', Dagny does feel emotions at her core when she allows herself to, and [[spoiler:takes a month-long vacation (her first in over 10 years)]] to cope with the hopelessness of the rail company she runs. When she finds out that [[spoiler:a key tunnel in the transcontinental line has been destroyed]], she spends the next day and a half shutting out every cognitive process not related to fixing the problem.
* In ''Literature/WolvesOfTheCalla'', the sixth ''[[Franchise/TheDarkTower Dark Tower]]'' book Jake goes into Safe mode after [[spoiler:His friend is [[FamilyUnfriendlyDeath blown up]] by one of the Wolves.]] In true Gunslinger fashion, this translates in TranquilFury
* In the ''Series/DoctorWho'' novel ''Winner Takes All'', the Doctor is forced by the villains to [[spoiler: use Rose like a puppet / video game avatar without any way to ask for her consent. And worse, in order to save her and others, he has to physically hurt her and make his control over her body even more absolute.]] He gets really, really furious once he realises what he must do. More so than ever in the TV series. He punches the wall, throws things around. And then he simply shuts down, becomes calm and cold and just does it - while being utterly terrifying in the eyes of the kid who is with him at the time. Then he proceeds to use the rescue plan to arrange for the entire military force of the villains to be atomized. And he doesn't give them any chance to reconsider. Not even one. [[note]]Well, he kind of generically threatened that he was going to destroy their planet if they hurt one hair on her head. But at that point she wasn't in any immediate danger yet, and he wasn't in his I-really-mean-it mode yet, instead telling others that he just intended to destroy the villain's technology to make them stop doing what they were doing.[[/note]]
** Technically, he's been in safemode since the end of the war of time, which is why he always seems so happy-go-round, he also warn his to-be enemies (whenever he has a chance) to not mess with him, apparently he believes that at some point the evildoers will realize that messing with the greatest mass murderer the universe has ever known is a bad idea, they never learn.
* ''XWingSeries'': Myn Donos of Wraith Squadron is stuck like this through most of the first book, after his squadron was killed in an ambush. Other characters aren't ''afraid'' of him, but they definitely find him strange, and ones who knew him before are unnerved. Even Safe Mode can't protect him when his astromech - the only other being to survive - is destroyed. Fortunately his squadron mates are able to break him out of the subsequent BSOD, and in a later book when he threatens to go into Safe Mode again he's called out on it.
* In the second series of ''The39Clues'', [[spoiler: Amy, who had previously appeared to be better adjusted to the insanity going on around her than her younger brother Dan,]] goes into HeroicSafeMode near the end of ''Trust No One''. [[spoiler: She]] even refers to the detached side as "Safe [[spoiler: Amy]]" and the involved side as "Scared [[spoiler: Amy]]." Last we see of [[spoiler: her in that book, she literally takes off running away from her brother and friends, shocked after the revelation that the Vespers seek to build a doomsday device and that she had just given them the final piece they need to do it.]]
* This is Mau's reaction to discovering the wreckage of his DoomedHometown in ''Literature/{{Nation}}''. He sets about blankly carrying each and every corpse -- man, woman and child -- of everyone he ever knew down to the sea, performing the [[BurialAtSea funeral rite]] and returning for the next one. Daphne, who washed up on the island in the same [[GiantWallOfWateryDoom wave]] that destroyed the village, can't get so much as a sidelong glance from him, and Mau himself seems to be experiencing the whole thing as if it were a dream.
* In ''Literature/TheImmortals'' series, this is [[NatureHero Daine's]] reaction to hearing of [[spoiler: her teacher Numair]]'s death. The resulting RoaringRampageOfRevenge marks the series' CrowningMomentOfAwesome.
--->Coolness trickled into her mind until her skull was filled with it. Her world seemed extra sharp and extra real. Part of her, someplace deep inside, wailed; that seemed unreal, as if she watched a crying baby from a great distance.
* Part of the training of the Mobile Infantry in ''Literature/StarshipTroopers'', that pop out when Rico and some friends on a leave are attacked by civilians who hate the military and, after inflicting a CurbStompBattle, he muses that they acted completely out of reflexes and the attackers were lucky that soldiers on leave weren't allowed to carry any form of weapons or they would be dead.

[[folder:Live-Action TV]]
* Malcolm Reynolds from ''Series/{{Firefly}}'' and ''Film/{{Serenity}}'' (see above) has been in this mode after the ragtag Independents lost the war against the [[TheBadGuyWins well-meaning but authoritarian Alliance.]]
* ''{{Chuck}}'' is a little ambiguous on how the Intersect skills work, but DependingOnTheWriter, Chuck flashes and then the Intersect takes control of his actions, until it has ceased.
* Seen repeatedly on ''{{ER}}'' when the doctors and nurses go on autopilot to get through the latest tragedy.
* In ''Series/DoctorWho'', the [[TheNthDoctor Ninth Doctor]] was prone to this kind of behaviour when shit was starting to hit the fan and people started dying. Especially in the beginning, as part of his implied war veteran characterization. At first, Rose the civilian had real trouble understanding the reason for his detachment and thought it was callousness - when actually, keeping a cool head and repressing his emotions was what he needed to do in order to get the job done. In the course of the series he kind of eased up on this behaviour as part of his healing process - only to end up having a HeroicBSOD because of his emotional investment. The pair eventually came to share a steady supply of post-crisis [[CooldownHug Cooldown Hugs]]. Well, not so much "Cooldown" Hugs as "Thank God It's Over And I Can Safely Show How Worried I Was, Please Just Hold Me For A Sec" Hugs. [[note]]It's like a Cooldown Hug, except the huggee is wise enough to know that he needs one. And it's more about active restoration of humanity than about calming down "hot" anger. Defrosting Hug?[[/note]]
--> '''Rose''': Mickey! I'll have to tell his mother he's dead, and you just went and forgot him, again! You were right, you ''are'' alien.
--> '''Doctor''': Look, if I did forget some kid called Mickey--
--> '''Rose''': Yeah, he's not a kid.
--> '''Doctor''': It's because I'm trying to save the life of every stupid ape blundering on top of this planet, ''alright''?!

[[folder:Tabletop Games]]
* In ''TabletopGame/{{Warhammer 40000}}'', learning how to enter Heroic Safe Mode is one of the core tenets of Eldar aspect warrior training.
** Normally, killing a Tau Ethereal will send [[HeroicBSOD all of the foot soldiers fleeing in despair.]] However, many Tau will enter Safe Mode instead, which they've described as feeling numb as they "go through the motions"; within a minute or two, TranquilFury kicks in and the Tau's gunline will start back up, [[RoaringRampageOfRevenge stronger than ever]].
* In ''TabletopGame/BattleTech'', there was an old optional Gunslinger rule called "Phantom 'Mech". The user had to be consider himself a dead man walking, have a genetic predisposition, ''and'' must be acting to save his allies. If it worked these would result in the mech suddenly moving in strange ways and becoming nigh-impossible to target properly, but the mental strain would force the warrior to retire into seclusion afterward.
** Canonically, only three characters ever achieved this: Patrick Kell, Yorinaga Kurita and Morgan Kell. The first was killed in battle by the second, after holding off more or less an army, the second lost in battle to the third, and they both retreated to secluded monasteries for 17 years before reemerging. Then they fought again with the same result, and Yorinaga committed suicide. Morgan Kell lived for decades more, rarely taking the battlefield, but utterly destroying any enemy he decided to face.

[[folder:Video Games]]
* ''{{Ar Tonelico 2}}'' has the protagonist Croix and his adopted little sister as their own little family. They're actually pretty normal, without him seeming overprotective. That is, until she's actually in life-threatening danger. He manhandles most of an [[spoiler: entire battalion of soldiers before his own commander takes him down.]] When he wakes up and realizes she's not with him, he then heads for the facility where she is. Too bad they didn't [[spoiler: have another battalion there to stop him that time.]] He doesn't speak at all during the first part and shows no emotion, and he's very quiet during the second. [[spoiler: They don't bother him again because they're too scared to upset him]].
* ''VideoGame/HyperdimensionNeptunia'' has the heroine herself who fails to convince the three goddesses to fight evil. The result is that she gets [[CurbStompBattle curb stomped]] and is forced to use her normal state.
* Perhaps not "heroic" but VideoGame/{{Touhou}}'s fighting game ''Hisoutensoku'' suggests that the birdbrained Reiuji Utsuho has a "nuclear supervisor" mode when she tends to the underground reactor. When the heroines from two scenarios descend into the reactor, they are intercepted by an Utsuho who delivers a rather dutiful but stilted monologue about the "core temperature dropping" due to "foreign material." Once she's KO'd, she goes back to her normal birdbrained self, easy BavarianFireDrill material.
* ''VideoGame/MetalGearRisingRevengeance'': After being subjected to a BreakingSpeech by Monsoon and subsequently undergoing a HeroicBSOD, Raiden recovers his "[[AxCrazy Jack The Ripper]]" persona to be able to beat him in the ensuing fight between them. Surely enough, Raiden beats Monsoon [[CurbStompBattle pretty handily]] [[TheresNoKillLikeOverkill and thoroughly]], and calms down afterwards.
* ''VideoGame/FinalFantasyVIII'''s Squall Leonhart is such a mess of emotional issues that it's difficult to pinpoint exactly when or to what extent he's emotionally checked out, or when it's this trope as opposed to TranquilFury or a full-blown HeroicBSOD. At the most conservative interpretation, Squall goes into Heroic Safe Mode at the D-District Prison at the beginning of disc 2 and slips in and out of it at intervals up until late in the third disc.
* ''VideoGame/TheGrayGarden'': The sight of [[spoiler:Froze, wing injured, being shoved off a cliff]] sends Yosafire into this, leading to [[spoiler:her leaping after her without thinking. Zig-zagged in that she leaves safe mode moments later to lament the fact that she's as good as killed herself (she can't fly either)... before immediately re-entering safe mode when this train of thought leads to the realisation that her handicap means Froze will die too. Next thing we (or Yosafire) see, Yosafire has Froze in her arms, and is gently flying them to safety]].
* Apollo Justice in ''VisualNovel/PhoenixWrightAceAttorneyDualDestinies'' suddenly becomes dark and brood, determining to uncover the truth behind the death of his best friend Clay Terran. [[spoiler: the true reason for this is because his perceive abilty points out his colleague Athena Cykes is hiding something from him, and she turns out to be the main suspect for the crime. As the result, he shuts down his ability, refusing to believe Athena is a murderer.]]

[[folder:Web Original]]
* Dan in ''TrintonChronicles'' can go into a [[spoiler: messiah-mode]] when knocked out and under much duress.
* In the ''Podcast/RedPandaAdventures'', the eponymous hero deliberately gives himself amnesia in order to [[spoiler:resist interrogation while captured by the Nazis]].

[[folder:Western Animation]]
* Aang intentionally enters this in the ''WesternAnimation/AvatarTheLastAirbender'' episode "The Serpent's Pass" after going into [[BerserkButton Berserk]] SuperMode last episode when Appa was stolen.
-->'''Aang:''' I know I was upset about losing Appa before, but ''I just want to focus'' on getting to Ba Sing Se, and telling the Earth King about the solar eclipse.
** It is pointed out that it seems mildly unhealthy. When the pregnant couple they're escorting gives birth, he begins to return to his old self. They name the baby Hope which is symbolic as Aang had finally allowed himself to hope again and be reminded of why he was doing this.

[[folder:Real Life]]
* Happens whenever somebody says that they've done something "on autopilot".
** As a general rule, people practicing emergency procedures (ranging from escaping a house to engaging an attacker, see below) are advised to practice them repeatedly so when the real emergency comes, they will be able to do it "on autopilot".
* Martial arts specifically make you able to fight without thinking. Accidents may ensue if an attack-like gesture provokes a violent reflex before you can stop yourself. Played for laughs in some anime.
** Some martial arts attempt to teach you to react only to actual threats, not "just" attack-like gestures, pushing this into more "heroic" territory.
** Some others, such as aikido, teach you to defend yourself without injuring your assailant[[note]]which could be considered a different kind of "safe mode"[[/note]], so if your conditioned reflexes are accidentally triggered it's no big deal.
*** Of course, little changes to the movements mean such a practitioner could easily take apart an opponent, if they felt there was a large enough threat.
* Soldiers are trained to fight at least partially this way, with things like giving and following commands, moving quickly from cover to cover, staying low, marksmanship, etc. all hammered into them repeatedly until it becomes almost a spinal reflex. This way, they are less likely to hesitate in combat, performing these numerous smaller tasks without having to think about them consciously.
** Cops are often trained that way, too. There's a good reason for this. When you're confronted with an armed suspect that's shooting at you, if you don't react quickly enough, you'll be killed.
** Many soldiers have complained about what happens when they come home, and they can't get back into Normal Mode, to extend the metaphor. On some level, they're still acting like they're in combat.
** This also lends itself to mindsets. The military trains for various types of emergencies, individual to base-wide. Having trained for emergency chemical response as part of the job, your mind switches to evaluate and take action in events like witnessing a car accident or finding someone unconscious. This allows you to deal with the situation at hand and deal with freaking out at a better time.
* The preferred coping strategy for [[{{Salaryman}} corporate office workers]] to keep from going mad at the realization that this is all they're going to get out of life. The entire raison d'etre for the "office comedy" genre in TV and film.
* Anyone in emergency medicine. When you're seeing humans (or animals) that are near death every day, multiple times a day, all you can do is shut down your own emotions because they only get in the way. They care -- they wouldn't be practicing medicine for a living if they didn't -- but there's no time to cry over a dog that's got hit by a car when in the next room you have a cat with a shredded leg at risk of amputation.
** Going back to the military example above, talk to anyone trained as a medic in any military organization. Their job consists of stabilizing life-threatening injuries in emergency situations, in a situation where any one of the people around them is another potential patient. As far as emotionally hazardous professions go, this one is pretty high on the list. During operations, sometimes medics have to do all the above while being actively ''shot at'', Geneva Convention or no Geneva Convention.
* Most every form of physical performance relies on committing minor, rudimentary details to muscle memory with repetitive practice, so you can save your decision making skills for deciding ''which'' action to take and ''when'', rather than [[CentipedesDilemma thinking]] about ''how'' to surmount an obstacle.
** For example, many digital artists find their workflow improves when they learn a significant amount about whatever programs they're using, so they can just draw and use shortcuts so their "flow" won't be interrupted.
* In general, this is a fairly common defense mechanicism to a traumatic experience. People have been known to "shut down" emotionally until they can properly come to terms with whatever happened to them.
** A related example. If someone is about to die and has given instructions on what to do immediately following (concerning funeral arrangements, matters of estate, etc.), the person following them may enter a Safe Mode to carry them out: not joining the rest of the family in bereavement until the instructions are complete.
* Not necessarily a heroic example as such. Masanobu Tsuji the "god of operations" was described by historian Walter Lord as doing this when working long nights planning operations for the Imperial Japanese military.
* This is how you're supposed to respond when you car has a severe mechanical fault appear while on the road, such as a brake failure or an engine fire (or both at once, if you're really unlucky) or you're involved in an accident. You need to avoid panicking, get out of traffic, get the car stopped, and put on your flashers. Then you can deal with what happened, emotionally.