History HoistByHisOwnPetard / WesternAnimation

* ''WesternAnimation/HotWheelsBattleForce5'': The ultimate goal of Krytus from is to free the locked away Red Sentient civilization, so they can have their revenge on the Blues. [[spoiler:When he accomplishes this goal, he finds out the Reds are just as sick of the war as the Blues, and they promptly seal Krytus away.]]

!!Often a DeathTrope, so expect to see unmarked spoilers ahead.

* ''WesternAnimation/TotalDrama'':

* In the ''WesternAnimation/AdventuresOfSonicTheHedgehog'' episode "[[Recap/AdventuresOfSonicTheHedgehogS01E60HeroOfTheYear Hero of the Year]]", Dr. Robotnik conducts a whole elaborate plan to have [[HonestJohnsDealership Wes Weasley]] lead Sonic, Tails and the various other Freedom Fighters to a yacht to have an award ceremony for Sonic. Robotnik crashes the party and forces Sonic to allow himself to be stranded in a bathysphere at the bottom of the sea in exchange for the others' safety, then admits that [[ILied he lied]] and was planning on sinking the yacht with everyone aboard, and smugly goes back to his fortress to [[ItsAllAboutMe have his own award ceremony]]. Weasley's reward was that he'd get his own shopping channel, but Robotnik lied about that too; [[KickTheDog Weasley wasn't given the freedom to actually broadcast, and their contract was written in disappearing ink]]. Upset that he's been had, Weasley rescues Sonic to take revenge on Robotnik.
* A non-fatal example in ''WesternAnimation/AdventureTime'': Flame Princess tricks Ice King into hurting himself with his own freeze attack by throwing a fireball above his head, which he then freezes, causing the block of ice to land on his head.
* In one episode of ''WesternAnimation/{{Animaniacs}}'', disgraced cartoon character Buddy attempts to get revenge on the Warner Siblings for ousting him of his (incredibly boring) cartoons by blowing them up at a party held in their honor. However, when Yakko admits they wouldn't have gotten there without Buddy, he races out to accept an award only to realize too late he fell for another one of their gags and is taken out by his own bomb, then is blasted into the surface of a giant prop mallet, which then falls onto the stage, crushing him.

* In ''WesternAnimation/BarbieLifeInTheDreamhouse'', Raquelle plots to steal Barbie's spotlight at a fashion show. She tries to prevent Barbie from attending the show by programming the Dreamhouse's MasterComputer, Closet, to lock Barbie in the house. Unfortunately, Raquelle gets locked inside as well.

* In one of the early ''WesternAnimation/CareBears1980s'' cartoons, Professor Coldheart takes a shortcut with his plan to use his freeze ray on an entire town, bouncing the ray off the bell in a tower to hit every kid in one shot. It works, but the Bears are then able to remedy it by using the bell the same way, with the CareBearStare.
* This trope is {{lampshade|Hanging}}d in ''WesternAnimation/CelebrityDeathmatch''. While the trope certainly applies in several fights, and does indeed during the Chuck Berry/James Brown match, it elects this remark from Nick Diamond:

* Since ''WesternAnimation/CourageTheCowardlyDog'' isn't a hand-to-hand fighter, this is his preferred method of beating the MonsterOfTheWeek.
* In the finale of ''WesternAnimation/{{Cybersix}}'', [[BigBad Von Richter]] could have just fled his base and survived. Instead, he wants payback and unleashes all his monsters to kill the titular cyber. They swiftly turn on him, while one [[TheGrotesque shows Cybersix the exit and smiles]].

* The ''WesternAnimation/DefendersOfTheEarth'' episode "Bits n' Chips" plays with this trope. Ming takes control of Dynak-X and arms her defenses against the Defenders. This leads to Mandrake, Lothar, Rick and LJ nearly getting caught in a trap (designed by Rick) which consists of a pit with an energy mesh which instantly incinerates anything which touches it at the bottom. However, thanks to Lothar's skill with grappling ropes, they [[EveryoneLives all manage to get out unscathed]], albeit barely in Mandrake's case; the rope breaks just as he reaches the far side of the pit, but Lothar pulls him to safety.

* In one episode of ''WesternAnimation/{{Doug}}'', Doug is caught with Mr. Bone's yodeling trophy and he has no way of trying to prove he didn't have it nor proving he was framed. Stuck with detention, he finds himself being confronted by Roger, who reveals that he was the one who did it and, as he gloats, accidentally pushes the PA system, having his confession echoed throughout the school. Needless to say, Roger went into panic mode once Mr. Bone confronted him.
* In ''WesternAnimation/DrawnTogether'', Clara shuts down Wooldoor Sockbat's "Clum Babies" store (Wooldor's sperm have magic healing powers) in a transparent parody of religious objections to stem-cell research. She contracts tuberculosis shortly thereafter.

* In the first season finale of ''WesternAnimation/DuckTales2017'', Magica [=DeSpell=] does this twice. [[spoiler:The first is capturing Scrooge in the first place. While the Duck Family was ready to swallow their own pride and apologize for their explosion after learning the truth of Della Duck and the ''Spear of Selene'', [=DeSpell=]'s release, gloating, and attack on Duckburg hastened all of that. The main one was accidentally saving Scrooge - having trapped him in his lucky dime the same way he did her, she tries to get it back when Dewey snatches it from her. When she blasts magic at him, he blocks it with the dime, freeing Scrooge. As he so elegantly puts it: "Way to dispel your spell, [=DeSpell=]!"]]
* Near the end of the ''WesternAnimation/EdEddNEddy'' episode "[[Recap/EdEddNEddyS1E5EdSirEdALot Sir Ed-A-Lot]]", Eddy locks Sarah in a "cage" just like she did to him earlier.

* A petard is an explosive device for blowing open doors, making the death of [[spoiler:Avocato]] in ''WesternAnimation/FinalSpace'' a very rare literal example of this trope when he's [[spoiler:killed by one of his own dropped door-opening bombs]].

* In ''WesternAnimation/GIJoeResolute'', Cobra Commander's last-ditch effort to get back at the Joes is aiming his super weapon on Washington, and to ensure he survives he locks himself up in a saferoom. Duke then aims his [[WeaponOfMassDestruction WMD]] at his base and traps the Commander in his own saferoom. However, [[JokerImmunity he somehow escapes]].

* The ultimate goal of Krytus from ''WesternAnimation/HotWheelsBattleForce5'' is to free the locked away Red Sentient civilization, so they can have their revenge on the Blues. [[spoiler:When he accomplishes this goal, he finds out the Reds are just as sick of the war as the Blues, and they promptly seal Krytus away.]]

*** In "[[Recap/CodenameKidsNextDoorS3E9GRADUATES Operation: G.R.A.D.U.A.T.E.S.]]", his plan ends up backfiring on him when Tommy puts his booger in the Code Module, turning him into an animal like the Kids Next Door operatives.
*** He later manages to make the above scheme work for him in the SequelEpisode "[[Recap/CodenameKidsNextDoorS5E13IT Operation: I.T.]]", when he uses the fact that he was technically a Kids Next Door operative to become Supreme Leader and uses the position to infest all the treehouses with broccoli. Numbuh 362 later threatens him to give her back the job with that same broccoli. Not to mention, she wouldn't have been able to get the job back in the first place had Father not began another game of tag to taunt her and Numbuh 1.