History BewareTheNiceOnes / LiveActionFilms

* In ''Film/SkyHigh2005'', Leila refuses to use her plant-control powers for violence, even when being taunted by the self-replicating cheerleader Penny. Then Penny slaps her. It turns out [[spoiler:she ''will'' use them in self-defense]]. "[[PreAssKickingOneLiner Big. Mistake.]]"

* ''Film/BlueBeetle'': Jaime is good-hearted and refuses to kill, who convinces the Scarab not to inflict violence on their enemies. But when he thought Carapax seemingly killed Rudy (though he had survived the ordeal), Jaime becomes [[RageBreakingPoint so enraged]] that he begins overpowering Carapax with raw power in revenge for all his actions inflicted on him and his family, and just before he could kill him, the Scarab is the one who held him back from doing so, having come to reason from his earlier non-violent lecture.

* ''Film/ForceOfNatureTheDry2'': [[spoiler:ExtremeDoormat Lauren finally snaps; infuriated by her so-called friend Alice's refusal to apologise for her daughter Margot being one of the gang who bullied Lauren's daughter Rebecca. When Alice says that she is proud of Margot and pities Rebecca for having someone as pathetic as Lauren as a role model, Lauren attacks her and violently shoves her to the ground. Alice [[DeathByFallingOver hits her head on a rock]] and later [[AccidentalMurder dies from her injuries]].

* Chris Washington from ''Film/GetOut'' is a kind, polite, and all-around likable young man who clearly loves his girlfriend Rose Armitage. While visiting his girlfriend's parents, Dean and Missy Armitage, he tries like a champ to put up with their odd and clearly off-putting behavior, as well as their creepy friends as well. After it turns out that [[spoiler:not only are Dean and Missy Armitage planning to transplant a brain into their body, but that [[BitchinSheepsClothing Rose was in on it the entire time]],]] Chris finally ''snaps''. [[spoiler: When Missy performs hypnosis as she has before in an attempt to knock him out, as she has before, he not only uses a handful of cotton to plug out his ears, but he also bludgeons Rose's brother, Jeremy, unconscious, then proceeds to [[ImpaledWithExtremePrejudice impale Dean with the antlers of a deer mount]], stab Missy to death, and stomp Jeremy to death after he attempts to stop Chris from leaving. The end of the movie has Rose, who has been shot in the chest by one of the family's slaves, then strangled by Chris, bleeding out in the middle of the road as Chris and his friend Rod drive away.]]

* Franchise/MarvelCinematicUniverse: Plenty of nicer heroes. Captain America? An old-fashioned Brooklyn kid who is incredibly polite and humble... and will ''completely'' mess you up if you cross a line with him. Thor? A big, grinning puppy dog of a guy -- just mind the hammer and the whole weather-related pyrotechnics. And then there's Phillip Coulson. Unassuming, squishy {{Muggle}}, looks and acts like a high-school principal. [[Series/AgentsOfShield Treats his team]] [[TeamDad like his kids.]] ''Completely'' unflappable dealing with everything from alien invaders (Loki), H.Y.D.R.A. agents, and even Film/GhostRider. EstablishingCharacterMoment? Threatening to taze Tony Stark, and watch ''Series/{{Supernanny}}'' while Stark was drooling into the carpet.

%% * John Candy had moments like this in his movies sometimes.

* In 90% of his movies, Creator/JackieChan portrays a genuinely well-meaning and kind protagonist who avoids violence as much as possible, and never kills his enemies. But when pushed to fights, he can be a fierce warrior, and give his enemies an incredible beatdown, especially when angered. This is lampshaded in ''Film/MrNiceGuy''s trailer.

%% * Ditto ''Film/TheBraveOne,'' where the lead is Creator/JodieFoster, and it's her fiance who gets killed.

* Franchise/{{Superman}} in ''Film/ManOfSteel'', as is consistent with any potrayal of the character. Even after he's seen rescuing a busload of his friends as a schoolkid, by [[SuperStrength hauling the bus out of water]], he continues to be bullied, but demonstrates remarkable restraint for a boy his age to forego any retaliation, and as an adult, is unfailingly polite and cooperative, even to the military demanding his surrender (to which he obliges). At one point, he saves a soldier who'd been firing at him and sincerely asks if he's alright, much to the soldier's shock. But when Zod makes the mistake of threatening his mother, Clark literally flies into a rage, spearing Zod through two silos, breaking his helmet and subjecting him to a very painful SensoryOverload, all while [[TranquilFury coldly]] [[DiagnosisFromDrBadass telling him exactly what's happening to him]].

* ''[[Film/RepoTheGeneticOpera Repo! The Genetic Opera]]'' has Nathan Wallace, a sweet, loving, gentle, somewhat campy man who dotes on his daughter, [[IllGirl Shilo]]. He also happens to be a [[PsychoForHire Repo Man]]. [[spoiler:In 'Let The Monster Rise', when he realises that Rotti has stolen Shilo from him, he completely snaps. It ain't pretty]].

* ''Film/{{Mothra}}'' is the only truly benevolent Kaiju in the ''Franchise/{{Godzilla}}'' films preferring to live in peace on her island home with her fairy companions and her worshippers. That is, so long as [[BerserkButton you don't harm and/or kidnap said worshippers/fairy companions]]. And, may Ghidorah have mercy on your soul if you dare harm [[MamaBear her children]].

** In the original trilogy, Luke is trying to fight Vader calmly and peacefully. Until Vader threatens to corrupt [[BerserkButton Leia]]. Luke promptly [[MemeticMutation bellows]], [[RoaringRampageofRevenge charges]], [[UnstoppableRage beats Vader down]], [[AnArmAndALeg lops off his hand]] and [[OutOfCharacterMoment barely restrains himself from killing him.]]

* ''Film/MissMeadows'': Miss Meadows takes this trope UpToEleven. [[spoiler:In the past, her mother was killed due to a drive-by shooting. Though she retains a sweet exterior, she's grown into a badass vigilante, killing violent criminals whenever they cross her path. Almost no one suspects ''because'' of her demeanor.]]

* ''Film/XMenFilmSeries'':