Hoist By His Own Petard / Web Original

Internet creators don't have all the time and money professionals have, so the same plan the villains devise often doubles as their own demise.
  • In one episode of Achievement Hunter's Things to Do in Minecraft, Geoff and Gavin create the Hop Till You Drop maze and takes glee in watching the other Achievement Hunters falling into the lava pit below. Flash forward to Let's Play Minecraft episode 44 and Geoff is the first one to find and mine the Tower of Pimps. A bad step causes Geoff to throw an Ender Pearl wildly. Where does it land? The lava pit, taking him out AND losing the Tower, forcing them to redo it over again.
    • In an episode of GO!, Geoff turns Ray's perfectionism against him as the latter is forced to choose a game using his primary Xbox Live account ("BrownMan" instead of his secondary "FluttershySucks"). The problem is is that Ray doesn't like having games left uncompleted on his account and thus he's left in an conundrum as he can't choose a game that he can't easily complete.
      • Another episode of GO! had Gavin win around because everyone else chose South Park: The Stick of Truth and were hit with a major update patch, allowing Gavin to coast to victory.
    • While the members of Achievement Hunter were playing a game of Uno on the Xbox One, Gavin Free suggests that they play the game to 500 points, the maximum. This is the result.
  • Season 6 of Arby 'n' the Chief introduces the character, Justin. Revealed to be the mastermind behind the console banning hacks that Arbiter, Master Chief, Chaos Theosis and Trent Donnovich have been using in seasons 5 and 6. When Justin presents Trent with network crippling software, guess who Arbiter takes out first?
  • In the Dwarf Fortress Let's Play, Boatmurdered, the players create a Doomsday Device that floods the area around the fortress with lava (and frequently use it against elephants and other enemies). In the end, they accidentally (?) burn an incoming trade caravan with it, set the fortress on fire, and as a result the inhabitants go mad and start killing each other (and/or just walk into the fire).
  • In the College Humor spoof of Inglourious Basterds, Nazi colonel Hans Landa is an extreme stickler for grammar who becomes increasingly frustrated with Monsieur La Padite's grammatical errors and unwillingness to cooperate with him. Triumphant with his discovery that there are Jews hiding under La Padite's floorboards, Landa mistakenly utters a dangling participle and chooses to commit suicide out of shame.
  • Happens to Big Mike, games master of all D 20 Live games, a lot.
  • DarkMatter2525 has this YouTube video where Jeffrey, God's assistant, asks him to stop teasing the atheists before he sentences them to hell, just because they didn't believe in him. God mocks this, by saying "they should have known" that an intelligent being such as themselves, had to have a creator. Jeffrey asks God who created him. He denies He has a creator. Jeffrey asks God if He is intelligent, and when He admits it, Jeffrey points out God is making the logical fallacy of "Special pleading," and hypocrisy, condemning those who did not believe the very thing he doesn't, either. This starts an argument so upsetting, that both kill each other. Hilarity Ensues when they appear before God's God to have God answer for His sins, including not believing in His creator!
  • When Jace of Deagle Nation plays The Sims 3, he builds a 20 foot high wall around his "gamer mansion" in order to keep the "Team Gamerfood terrorists" out. This comes back to bite him in the ass when, after the house catches on fire, the wall prevents the firemen from coming into the house.
  • In Death Battle, Taizo Hori kills White Bomberman with his own bomb.
    • Similarly, Rainbow Dash defeats Starscream by tricking his own guided missiles into hitting him instead of her.
    • A double dose in Dr. Wily vs. Dr. Eggman. Eggman uses Metal Sonic against his opponent, and Wily unleashes the Roboenza virus as a counter, which leads to Metal Sonic going on an indiscriminate rampage and both their demises.
  • In Fear, Loathing and Gumbo on the Campaign Trail '72, this happens to President Rumsfield when he is accused of being mentally unfit, having a "nervous breakdown", during his impeachment proceedings and is dragged away to one of the same mental hospitals that he himself locked many of his political opponents in.
  • Goodbye Kitty: Black Kitty's deaths are often caused by this.
  • Ink City: Trevor plotted to paralyze Yakko and Rigby so he could experiment on them. Instead, he wound up trapped within his own paralyzing fluid. Rigby then broadcast a video of this latest kidnapping attempt to the City at large as proof of Trevor's nature; Trevor had previously used a video of Rigby attacking him to damage his friendship with Phoenix and paint himself as the victim.
  • Kick Assia has Benzaie try to use Beary as a grenade launcher, but spends too much time saying farewell, that the grenades explodes in his face.
  • Marble Hornets has the Big Bad of the series, Alex, being dragged off by the Operator after being defeated by Tim, just like how he sacrificed people to the Operator to save himself.
  • In the MSF High Forum, The Manager Has made the mistake of checking to see if the snake he just nearly fed two PCs to is okay. Good news! The snake is okay. Bad news! It's in a bad mood.
  • In MSF High proper, for the first female-to-male TG in the comic.
  • In chapter 5 of the Neopian Times story Revenge, during a Yooyuball game, Alex uses her sling to hurl a potion at Naqasa that will turn her into a hideous mutant Usul. However, Naqasa's brother Q'tai is also playing and throws his ball to hit the potion and send it flying in Alex's direction so that she gets drenched with it instead.
  • In Noob Season 2 finale, Master Zen calls a Game Master on Arthéon and Sparadrap for possession of the hacked staff. When the Game Master shows up, he reveals that possession of hacked equipment no longer ban-worthy due the fact that the game authorities have realized that it was involuntary on the player's part. Master Zen's reaction is to take the cheated staff and try using it against Sparadrap and Arthéon, and act which is still forbidden. This scene is the equivalent of calling the police on someone for misconduct, having it transpire that the misconduct was involuntary, then having the person who called the police doing something arrest-worthy while the agent is still present.
  • Nyx Crossing features a fight scene in episode 3. Frank pulls out a knife to fight one of the natives, but it gets turned against him, and Frank ends up with a serious injury.
  • In ‘’Fkin Meteos’’, The Odd One, as Brolaf, was caught trying to kill the enemy pink by Leona, he then got hit by the enemy Ahri’s Q, which gives her movement speed every time she cast it, causing her to be more aggressive, which ultimately resulted her getting caught by TOO’s axe and get herself killed by Irelia.
    TheOddone: That’s right, I’ve just Ahri’s movement speed bonus AGAINST HER.
  • The Questport Chronicles: The mysterious mage falls victim to a nasty cycle of Addictive Magic and a life-draining Amplifier Artifact.
  • In Reds:
    • When the socialist Worker's Party wins the 1932 US election by a landslide, President Herbert Hoover, at the urging of Douglas MacArthur, decides the suspend the Constitution, declare the whole election void, and order the Worker's Party members arrested. This creates such a storm of outrage amongst the public and the military that it leads to the very socialist revolution the capitalist powers were hoping to avoid. End result: the capitalists get their asses kicked out of the USA (which becomes the UASR) and MacArthur becomes President Evil of the US government in exile.
    • Henry Ford flees the UASR to Germany, where he becomes Hitler's chief armament minister. His arrogance and belief in Nazi superiority leads him to put his marque on everything his company builds, including weapons produced with slave labour. When Germany is defeated, he's unable to deny his very obvious role in Nazi atrocities, and gets no mercy from the UASR.
  • The space pirates in Red vs. Blue use an alien structure as a tractor beam to crash ships and strip them for parts. Later on the Reds and Blue's send their trainees to take control of it and crash the pirates own ship.
  • While Let's Playing New Super Mario Bros. Wii, The Runaway Guys frequently abuse the bubble mechanic. This can backfire when the sole player who's not bubbled winds up dying. In particular, Episode 14 illustrates this well — in part by being the first episode of that Let's Play that had to be broken up into two videos due to its length...
  • RWBY: When Neon and Flynt fight Yang and Weiss during the tournament, they are defeated by having their abilities turned against them. Yang crushes the barrel of his weaponised trumpet causing the powerful soundwave to blast back in his face. Neon spends the entire fight taunting Yang to make her angry, but Yang's power-up is connected to her temper; when Yang explodes, she destroys the arena. Neon's speed depends on her rainbow-spewing rollerblades, so the ruined terrain trips up her wheels, making her an easy target.
    • Volume 5 has Cinder hit this trope so hard, she can see all of Remnant. To wit, Cinder and her group has just confronted Ruby and her team and is fighting. Cinder gets angry when a visibly upset Jaune is able to score a hit and knocks him down. When he decides to Face Death with Dignity, she decides to Kick the Dog and stab Weiss with a fire spear. As she and a few others (which include Yang's mother Raven) go off to the Vault of the Spring Maiden, Jaune quickly gets to Weiss' side and is able to finally unlock his Semblance, which allows him to amplify auras, boosting Weiss' Healing Factor, thus healing her wound and saving her life.

      A few minutes later, Cinder decides to preempt any possible backstabbing and freezes Raven while she uses her Grimm arm to impale Vernal, Raven's trusted lieutenant and the Spring Maiden, to steal her power. But, something isn't right: to Cinder's shock, there's no power. That's because Vernal was never the Spring Maiden at all — it was Raven. Now Cinder, who was weakened by Ruby earlier, her trump card out in the open and sporting the power of a Maiden for all of half a year at the very least, is now facing down someone who isn't weakened, very pissed off and armed with something Cinder is not ready for.
  • Sociopathic Hero Jobe of the Whateley Universe created a serum that would let him turn women into his dream girl - a drow hottie with incredible regeneration abilities. Yep, you guessed it. He accidentally received an injection. In addition, just to rub it in, the amazing regeneration means he can't find a way to turn back to his old self.
    • Power mimic Counterpoint has this happen to him more than once in the Whateley Universe. In a holographic simulation, the version of Counterpoint attacks Phase to steal Phase's powers; but Phase figures out how to use his density-changing powers to kill someone with density-changing powers. Counterpoint beats up Chaka to get Chaka's Ki-manipulation power; but Counterpoint can't use both yin and yang (he's a very masculine god of war) and so the built-up yin in his system nearly kills him before Chaka saves him. And then he tangles with Jobe...
  • In Worm, Jack Slash suffers a Fate Worse Than Death at the hands of Gray Boy, who he had cloned in the first place to replace the original. In addition, Golem, the hero that orchestrated these events, is in fact Theo Anders, who Jack had challenged to kill him two years previously.
  • In The Adventure Zone: Balance, Taako possesses a weapon called the Umbra Staff, a wand disguised as an umbrella which eats the magical essence of a defeated enemy spellcaster. This usually just involves the staff eating the target's wand. Liches are formed when a spellcaster combines their magical essence and their soul, making them immortal and incredibly powerful. Therefore, when Tres Horny Boys manage to defeat one in combat, he's immediately eaten by the Umbra Staff, because magical essence is all that's left of him.
  • DSBT InsaniT: If anyone gets a hold of Stephanie's mic, they can use her brainwashing music to their advantage.
  • Tom Scott's story, "Single Point of Failure", is set off when one of Google's five trusted users sabotages their password code to, effectively, let anyone into any Google account without a password. Most of the story focuses on the devastating effects this has, but at the end, almost as an afterthought, he mentions that she ended up arrested when her getaway flight was delayed — because the airport ran on Google Apps.