History HoistByHisOwnPetard / FIlm

* In ''WesternAnimation/TheEmperorsNewGroove'', had Yzma not sent Kronk down a trapdoor, he wouldn't have (accidentally) stopped kitten Yzma from drinking the antidote potion.

* ''WesternAnimation/IceAgeDawnOfTheDinosaurs'' has a pterosaur’s plan to scare the possums backfire.

** This trope is the MO of [[BigBad the White Death]], who has a tendency to [[UseTheirOwnWeaponAgainstThem kill his enemies with their own weapons]]. The Prince attempts to [[ExploitedTrope exploit]] this using a rigged gun that [[BackwardsFiringGun fires a bullet backwards into the person holding it]], planning to trick her father into taking the gun and attempting to kill either her or the Father with it. While this initial plan fails, the White Death's end still does end up coming from an extreme buildup of this trope throughout the film. On top of the previously mentioned gun, the Prince also rigged the suitcase being delivered to him with a bomb, which gets set off right by his {{Mook}}s right before he has a chance to kill Ladybug. When he has the Elder at his mercy, he decides to kill him with a game of RussianRoulette "for old times sake", giving the Father enough time to intervene and allow the Elder the chance to mortally wound him. Finally, after learning that his [[ComplexityAddiction his overly-complicated revenge plan]] was AllForNothing because the guy who killed his wife was never on the train in the first place, he attempts to kill Ladybug with the rigged gun, resulting in him accidentally killing himself.

* ''Film/ThePurge'':

* The bridgekeeper in ''Film/MontyPythonAndTheHolyGrail'' kills anyone who can't answer his question. When Arthur answers with another question, the bridgekeeper fails to answer it, and gets killed by his own spell.
--> '''Bridgekeeper:''' What is the airspeed velocity of an unladen swallow?
--> '''King Arthur:''' What do you mean? An African or European swallow?
--> '''Bridgekeeper:''' Huh? ...I don't know that. AAAAAAGGHHHH!!!!

* In ''WesternAnimation/TheHunchbackOfNotreDameDisney'', [[SinisterMinister Frollo]] while trying to kill the heroes, keeps hacking the stone gargoyles they are clinging to with a sword. The circumstances conspire so that he has to use one of the gargoyles for support. As he climbs on top of the gargoyle and raises his sword to kill Esmerelda, Frollo bellows "[[DeathByIrony AND HE SHALL SMITE THE WICKED AND PLUNGE THEM INTO THE FIERY PIT!]]". But just then, the cloven stone breaks under his weight and he plunges to his death. For extra flavor, said gargoyle appears to come to life to snarl at Frollo, who has only enough time to let out a shocked cry of [[BigNo "NO!"]] before he falls.

* In ''Film/{{Dave}}'', White House Chief of Staff Bob Alexander chooses to have Dave pose the President when the real President is felled by a stroke. It works...only Dave decides to go ahead and embark on things against Bob's interests such as a major job bill and because everyone believes he's the President, they go with it.

* ''Film/TalesFromTheHood2'': Dumass Beach is killed by his the Robo-Patriot robot he intends to become America's police force when he detects him to be a clear and present danger to America's future.

** In the first ''Film/{{Transformers|2007}}'' live action movie, the Decepticon Frenzy is killed by one of many CD like 'throwing stars' which he himself fired. The thing arced in mid-air and came right back at him.

* In ''WesternAnimation/{{Tarzan}}'', Clayton repeatedly tries to slash Tarzan with his machete. Tarzan throws down a cluster of vines to entangle Clayton. Clayton slashes through the vines in a blind fury, not noticing one is wrapping around his neck. He chops through all the vines holding him up and plummets with the one still wrapped around his neck. The vine pulls tight and Clayton is hanged.

* In ''FilmSnapshot1979'', [[spoiler:Elmer]] is [[ManOnFire set alight]] by the can of fuel and fire he was using to threaten Angela.

* Debbie Jellinsky of ''Film/AddamsFamilyValues'' gets hers big time when she rounds up the entire family (with the exception of the new baby, Pubert) and puts them all in electric chairs. Pubert, after taking a very improbable trip to the sky, lands in the middle of the basement where Debbie is carrying out her plan and connects two frayed cords just as she throws the switch, which proves to short-circuit her plans as she is electrocuted instead.

* Starscream's ChronicBackstabbingDisorder comes back to bite him in his shiny, metal ass ''terminally this time'' in ''WesternAnimation/TransformersTheMovie'' when he dumps the badly damaged Megatron out into space. This puts Megatron in a position to be found by Unicron and reformatted into Galvatron. Naturally, Galvatron decides to test his new weapons out [[YouHaveFailedMe on Starscream]].

** In the first ''Film/{{Transformers}}'' live action movie, the Decepticon Frenzy is killed by one of many CD like 'throwing stars' which he himself fired. The thing arced in mid-air and came right back at him.

* ''Film/ShockingDark'': In the process of intentionally polluting UsefulNotes/{{Venice}, the [[MegaCorp Tubular Corporation]]'s underground complex was overrun by their own creations, and the complex's employees were either killed or transformed into machines.

* In a truly tragic example of this happening to a hero, the title character of ''Film/TheKiller'' loses both of his eyes as he is fatally gunned down by BigBad Wong Hoi, paying horribly for his accidental blinding of Jenny, the beautiful lounge singer who he was in love with, at the beginning of the movie.

** In ''Film/TeenageMutantNinjaTurtles'', after Shredder has the turtles on the ropes, Splinter unexpectedly appears and [[IKnowYourTrueName reveals Shredder's true identity as Oruku Saki]] and that Splinter himself was the rat that scarred Shredder's face many years ago. BlindedByRage, Shredder forgets the turtles and attacks Splinter in a rush, only for Splinter to basically flip him over the edge of the roof, suspended above the street and saved from death because Splinter is holding him up. Shredder makes a last attempt to kill Splinter, throwing a dagger at the rat... and in order to protect himself and catch the dagger, Splinter has to let go of Shredder, causing Shredder to fall to his (apparent) death.

* In ''Film/IndianaJonesAndTheLastCrusade'', Donovan is a wealthy and amoral American socialite obsessed with living forever [[PiggybackingOnHitler even if it means shaking hands with Nazis]]. His words to Indy are to "not trust anyone". When he reaches the finish line, he is in a room with hundreds of grails and has no idea what the Grail might look like, so he trusts Nazi archeologist Elsa Schneider to pick the real one for him. She gives him the wrong one to dispose of him, and he dies a NightmareFuel death by [[RapidAging aging centuries in a matter of seconds]].

* ''WesternAnimation/TheIncredibles''