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[[quoteright:330:[[Manga/LuckyStar http://static.tvtropes.org/pmwiki/pub/images/Taniguchi_2415_229.JPG]]]]
[[caption-width-right:330: You made me climb Mt. Fuji for this, [[RantInducingSlight AND YOU SAY IT'S TOO WARM FOR YOU?!]]]]

->''"When one person who is hardly ever upset about something, suddenly raises their voice, the world turns upside down and seems to come to an end...it is often the quietest lamb that can have the roar of a lion."''
-->-- '''[[WesternAnimation/PhineasAndFerb Ferb]]''', ''Fanfic/TheSeerPhineasAndFerb''

%% One quote per page please. The others can go on the quotes page.

Sometimes, trying to BreakTheCutie has consequences. Sometimes, the nicest person in the story [[RageBreakingPoint gets pushed to the limit of what they can take]]... and the results are ''not'' pretty.

The sweeter, gentler, more polite, [[IntroversionTropes more peaceful]], and overall [[NiceGuy nicer]] a character is, the worse it will be for whomever is in the vicinity when they're subject to one round too many of BreakTheCutie, or DudeWheresMyRespect, a RantInducingSlight, or hitting their BerserkButton or RageBreakingPoint. What was once a sweet and nice individual suddenly ''snaps'' and becomes something far worse than the BigBad could have expected.

Think it's called UnstoppableRage for nothing?

Although any Nice One can make you wish you were never born, there are certain tropes which act as a sort of force multiplier. Check any of the following tropes to see just what is most likely in store for whomever set off the Nice One: BadassAdorable, DeathGlare (which should ''never'' be brushed off), MamaBear (or TeamMom, or PapaWolf, depending), TheQuietOne, TheSoCalledCoward, TeachHimAnger (a ''[[TooDumbToLive suicidal]]'' idea with the GentleGiant), and TranquilFury. Especially bad when dealing with a TechnicalPacifist, and even worse when dealing with an ActualPacifist (for whom this is not an unusual trait). Combine all at once and there may not ''be'' a minimum safe distance to escape their wrath.

More TruthInTelevision than you think - [[http://en.wikipedia.org/wiki/Deferred_gratification deferring gratification]] with regards to expressing one's anger tends to make the end result... [[DisproportionateRetribution less than pretty]]. Also, it's generally more frightening when a more mellow person starts acting up because [[OOCIsSeriousBusiness it's so unexpected]].

Cultures that have a reputation for being polite, non-confrontational, and passive-aggressive usually have a history of being very warlike in the past; think Scandinavia, Canada, Minnesota, USA & neighboring Midwest States, or Japan. These cultures developed polite, non-confrontational, passive-aggressive characteristics to keep from killing one another off; push them too far, however, and they can and will remember their heritage; also see RealLife instances of MeanCharacterNiceActor.

See also GoodIsNotSoft, when a normally affable character realizes that nice won't always get things done in a situation. They can coincide, if the realization and the outrage are triggered at the same time. An ActualPacifist subjected to the same stresses will turn into a BadassPacifist instead (unless this becomes a WhamEpisode in which pacifism is renounced.) The results are quite similar if they MaddenIntoMisanthropy, the difference being the new misanthrope isn't so much a violent dynamo as a care free {{Jerkass}}.

This is not to be confused with a character being a BitchInSheepsClothing (or even FaceOfAnAngelMindOfADemon). While the latter trope's 'nice' image is usually just a facade for their genuinely callous personality, this trope involves a genuinely nice character submitting to a rare act of malice. Repeated subjection of a nice character to this trope, though, may result in [[{{Flanderization}} Flanderizing]] them to such a degree that it's impossible to tell the difference.

Can also result from being repeatedly subjected to the losing end of the MiseryPoker trope when their combined traumas far outweigh any single problem another character has because of feeling like a ButtMonkey due to their very real and legitimate problems repeatedly being ignored.

The polar opposite of IsThisWhatAngerFeelsLike.

Subtropes include LetsGetDangerous; CrouchingMoronHiddenBadass; MinoredInAssKicking; TheSoCalledCoward; and WhosLaughingNow.

Also compare {{Yandere}}, CuteAndPsycho, KillerRabbit, DidYouThinkICantFeel, BadassSanta.

A ThisMeansWar declaration may be delivered as a result of it. For a common aftermath of this trope, see CruelMercy.

Compare/contrast KnightTemplar. Compare BewareTheQuietOnes if they are known for their silence more than their kindness. Compare KillerRabbit for when you need to beware the ''cute'' ones. Compare BewareTheSillyOnes when they're known for clowning around. Compare SilkHidingSteel, for when you should beware the ''proper'' ones. May also act as an {{emotional power|s}}.

!!Examples subpages:
* BewareTheNiceOnes/AnimeAndManga
* BewareTheNiceOnes/ComicBooks
* BewareTheNiceOnes/FanWorks
* [[BewareTheNiceOnes/AnimatedFilms Films Animation]]
* [[BewareTheNiceOnes/LiveActionFilms Films Live-Action]]
* BewareTheNiceOnes/{{Literature}}
* BewareTheNiceOnes/LiveActionTV
* BewareTheNiceOnes/{{Music}}
* BewareTheNiceOnes/MythsAndReligion
* BewareTheNiceOnes/ProWrestling
* BewareTheNiceOnes/TabletopGames
* BewareTheNiceOnes/VideoGames
* BewareTheNiceOnes/VisualNovels
* BewareTheNiceOnes/WebAnimation
* BewareTheNiceOnes/WebComics
* BewareTheNiceOnes/WebOriginal
* BewareTheNiceOnes/WesternAnimation