History NiceJobBreakingItHero / Film

!! Film - Animated
* ''WesternAnimation/BeeMovie'': Layton: "This is an unholy perversion of the balance of nature, Benson! You'll regret this." Needless to say, the defense attorney was absolutely right, as Benson's victory did upset the balance of nature. Fortunately, Benson did fix it before it became irreversible.
* ''WesternAnimation/TheBraveLittleToaster'': After learning that the abandoned house they were left in is now for sale, five appliances head out to reunite with their "master" and go through numerous perils trying to find him. [[spoiler: However, their now-grown up "master" is heading to college, and he returns back to his old home to pick up some of the leftover stuff to use at his dorm (namely, them) roughly about two days after they left. ''They could have avoided all the trouble they went through if they had just listened to Kirby the vacuum cleaner earlier and stayed at the house.'']]
* In ''WesternAnimation/BrotherBear'', the central point of the story is that Kenai pursues and kills a bear he blames for his brother's death. Later on, he realizes to his horror [[spoiler:that was Koda's mother]].
* ''WesternAnimation/TheLorax'': The Once-ler starts off with good intentions when he makes the Thneeds, like not polluting the water, not clear-cutting everything, not consuming all the food, and not terraforming the forest into a wasteland. [[CrapsackWorld Now......]]
** Made even more significant when [[spoiler: he didn't have to chop all the trees down in the first place. All the harvesting was at the top meaning the wood wasn't needed at all, unless it was the material to build the industry.]]
* ''WesternAnimation/{{Mulan}}''
** Mulan's grandmother gives her a cricket to give her luck in order to help her with the matchmaker. While Mulan wasn't performing well to start with, it's obvious that the cricket ends up being a main direct cause for her failing the matchmaking.
** In the snow mountains, Mushu accidentally fires a rocket in the sky, revealing the heroes' locations to the Huns, which gives them some advantage in their fight. Good thing Mulan found a way to turn the tides to their favor...
* In ''WesternAnimation/{{Nine}}'', the title character's newfound friends [[spoiler: take out the mechanical beast who had been threatening them]], only for 9 to realize that [[spoiler:the MacGuffin he'd woken up with fit perfectly inside a larger machine nearby. Said machine proceeds to kill 2 immediately, followed by 8, 5, 6, and 1 before it's all done.]]
** Not only that, but what he did was ''exactly'' what said mechanical beastie was trying to do not five minutes before. TooDumbToLive.
** Also, the Stitchpunks [[spoiler:blowing up the factory]]. Beforehand [[spoiler:the Fabrication Machine had been SealedEvilInACan, being confined to said factory]]. However, instead of [[spoiler:being destroyed in the explosion, the Fabrication Machine was essentially freed and proceeded to chase after the Stitchpunks itself, leading to the deaths of 5, 6, and 1]].
* ''WesternAnimation/WreckItRalph'': The Nicelanders' [[{{Jerkass}} behavior]] towards Ralph makes him leave the game to try to prove that he could be a good guy, which almost [[ApocalypseHow gets their game shut down]].
** Ralph's own game-hopping almost gets ''Sugar Rush'' devoured by a [[BigCreepyCrawlies horde of]] [[TheAssimilator Cy-bugs]], and turns BigBad [[spoiler:Turbo]] into a OneWingedAngel capable of taking down the whole arcade. The latter even calls him out, gloatingly thanking him for it. [[spoiler:He fixes both these mistakes by drowning them in lava.]]
* In ''WesternAnimation/KungFuPanda2'', if Po had not [[spoiler: entered Lord Shen's weapon foundry against the advice of Tigress]], then the [[FiveManBand Furious Five's]] plan to [[spoiler: blow up Lord Shen's cannons would have succeeded without a hitch. Instead, they had to get rid of their explosives or Po would be blown up along with [[BigBad Shen]] and the {{Mooks}}. Not only that but Shen managed to shoot Po with his largest cannon, and he would have died if the Soothsayer hadn't found him unconsious in the river.]]
** And in the first movie Shifu, having seen Tai Lung's escape in a vision, send the goose Zeng to check and make sure Tai Lung's prison is secure. While there, Zeng accidentally drops a feather, which Tai Lung uses to pick the locks binding him and escape.
* In ''WesternAnimation/JusticeLeagueDoom'', Batman's CrazyPrepared status finally gets them into trouble when a team of villains decide to steal a bunch of data from his computer, specifically, the weaknesses of the Justice League.
-->'''Batman''': ''Alfred, get the Batwing ready! The Justice League is under attack!''\\
'''Alfred''': ''By whom?''\\
'''Batman''': ''By '''me!'''''
* Aladdin tricking Jafar into becoming a genie saved the day in ''WesternAnimation/{{Aladdin}}''. But when he gets loose in ''WesternAnimation/AladdinTheReturnOfJafar'', Aladdin's created a foe with all of the Genie's powers and none of the morals. Although at the same time, some of the threat is gone because genies can't kill, [[RunningGag but you'd be surprised at what you can live through.]]
* In ''WesternAnimation/{{Hercules}}'', Hercules frees two boys but unwittingly releases the Hydra. But after trying to defeat it by after cutting head off, three more heads grow in its place. This creates a problem after cutting so many times where there's a swarm of heads.
* ''WesternAnimation/{{The Little Mermaid|1989}}'': Ariel's failed DealWithTheDevil allows Ursula to gain access to King Triton's trident, unintentionally dooming her civilization.
** King Triton letting his temper get the better of him and destroying his daughter's grotto was what led to Ariel running away and making that deal with Ursula in the first place, mind you.
* ''WesternAnimation/TheLittleMermaidIIReturnToTheSea'': Ariel refusing to tell Melody about her merfolk heritage and her reason of not allowing her to explore the sea is what sets the plot in motion.
** Melody, for not handing over the trident to Ariel and giving it to Morgana.
* ''WesternAnimation/{{Frozen|2013}}'': After Elsa accidentally struck Anna with her powers, their parents kept them apart and isolated her in her room; however, being isolated and fearing her powers is the reason Elsa can't control them.
** Anna, after she informs Elsa of the EndlessWinter she's created. The "breaking it" part is that she will not stop talking (how she's trying to help), which further drives Elsa into having a panic attack.
* ''WesternAnimation/ShrekFourD'': Fiona tosses a grappling hook at a rock in an attempt to stop the raft she's on from going over a waterfall, but when Shrek and Donkey show up to save her, they jump on the raft. The added weight causes the grappling hook to snap.
* In ''WesternAnimation/TheSpongeBobMovieSpongeOutOfWater'', [[spoiler:when [=SpongeBob=] and Plankton watch the cosmos for Bubbles, Jupiter ends up crashing into Saturn. This causes Bubbles to get fired and become aggressive toward the duo]]. However, it's {{subverted|Trope}} later, when [[spoiler:Bubbles reveals that he hated his job; he rewards the heroes by granting them the ability to breathe above water]].
* Basil and Dawson are in Ratigan's DeathTrap in ''WesternAnimation/TheGreatMouseDetective''. The DeathTrap has fortunately been foiled by the broken record. Dawson bellows out his "[[GetAHoldOfYourselfMan Pull Yourself Together!]]", and causes the record needle to jump past the broken spot, thereby starting the DeathTrap up again -- {{ironic}}ally "breaking it" by fixing it. Further {{ironic}}ally, this has been cited as a SugarWiki/MomentOfAwesome for Dawson.
* ''WesternAnimation/{{Moana}}'': [[MilesGloriosus Maui]] stealing the heart of Te Fiti results in [[spoiler: her becoming her SuperPoweredEvilSide.]]
* ''WesternAnimation/BeautyAndTheBeast'':
** Maurice is caught by the enraged Beast who is on the verge of throwing Maurice out, not caring about the fact that wolves would've eaten Maurice. But when Maurice claims he needs a place to stay [for a night], he unintentionally prompts the Beast to irrevocably imprison him in retaliation [[{{Hypocrite}} when ''he's'' the one who didn't want Maurice or any trespassers in the castle in the first place.]]
** When Gaston is about to have Maurice sent to an insane asylum because of his story about the Beast, Belle uses the magic mirror she brought from the castle to show the Beast to all the villagers, as proof of her father's sanity. But the Beast's fearsome appearance terrifies the villagers, and even Belle's attempt to assure them of his kindness makes things worse, as Gaston realizes her romantic feelings for him, and out of jealousy he leads the crowd in storming the castle to kill the "dangerous" Beast.
* In ''WesternAnimation/MyLittlePonyEquestriaGirlsLegendOfEverfree'', Human!Rarity tries to reason with the BigBad (who's dead-set on keeping everyone at the camp forever) by mentioning how she'd miss her weekly trips to the spa. Sadly, this turns out to be the BigBad's BerserkButton. Whoops.
* ''WesternAnimation/TheIncredibles:''
** Before his Face–Heel Turn, it was Syndrome's first attempt at being heroic. When attempting to get the police, Bomb Voyage slyly puts a bomb on his cape, forcing Mr. Incredible to abandon Bomb Voyage and save him. This not only causes Bomb Voyage to escape, but for innocent civilians to get seriously injured while riding a train (the bomb destroyed the train tracks). This then leads to several events & lawsuits against the supers and the Supers Registration Act. After all this, Syndrome had the gall to play the victim.
** Helen activating the homing device, causing Syndrome to find out where Mr. Incredible was located.
* ''WesternAnimation/OneHundredAndOneDalmatiansIIPatchsLondonAdventure'': Patch appearing as the lucky dog in the front page headliner photo at the Thunderbolt audition unfortunately ends up biting him, as reading the Ratcliffe's new address on his collar from the photo allows Cruella De Vil to know where Anita and Roger moved to and steal the puppies once again. She even sadistically thanks him when he appears at her warehouse to rescue the other puppies.
-->'''Cruella''': Well, well, well. What do we have here? Oh, it's you! (''chuckles'') I owe you a debt of gratitude, my photogenic little friend. If it wasn't for you, I'd have never found your brothers and sisters! And now I have you ''all!'' ''([[EvilLaugh cackles evilly]])''
* The Jetlag Productions version of ''Literature/SleepingBeauty'' adds this twist to the story. After princess Felicity pricks her finger and falls under the evil fairy Odelia's curse, Odelia actually ''thanks'' Primrose, the fairy who altered her death curse, for setting it up. Odelia explains that she just wanted to kill Felicity, but Primrose has made it so that Felicity will remain unchanged for a hundred years, and when she wakes up, everyone she ever knew and loved will have been long dead. Conversely, Felicity's parents are left to moan that they're going to die knowing their daughter will be all alone when she wakes up, as they grow older she won't age a day.
* In the [[DirectToVideo Direct To DVD]] film ''[[Franchise/DisneyFairies Tinkerbell]]'', Tink's reckless actions ruin all of the fairies' preparations for spring, threatening to cause a chain reaction that disrupts all the seasons, which would result in an ecological catastrophe. Only her [[GadgeteerGenius brilliant inventions]] get the fairies back on schedule.
* A lot of the plot for ''WesternAnimation/TeenTitansGoVsTeenTitans'' is caused by Gentleman Ghost hopping into 2013 Raven's mind and breaking her mental gem holding her demon side.
* As in [[ComicBook/{{Flashpoint}} the comic it's based on]], the altered timeline in ''ComicBook/JusticeLeagueTheFlashpointParadox'' is the result of [[spoiler:Franchise/TheFlash messing with time to keep his mother from dying.]] Oh, and as ''WesternAnimation/JusticeLeagueDarkApokolipsWar'' shows, it kept getting worse as [[spoiler:it's revealed there that Darkseid's interest in Earth, first shown in ''WesternAnimation/JusticeLeagueWar'' was caused by Barry's actions -- and the majority of ''Apokolips War'' takes place in a BadFuture where a lot of Earth's heroes are either dead or converted into ''ComicBook/TheNew52FuturesEnd''-style cyborgs, Earth has suffered irreparable damage, and the PyrrhicVictory was to such a degree that Barry has to go back ''again'' to try to fix things.]]

!!Film - Live-Action
* ''Film/AdvanceToTheRear'': During the opening battle, Heath sends Owen to return due to camp due to feeling that his "horse magnetism" might cause the order of battle to fall apart but he passes Brackenbury, causing his horse to start following Owen, which causes the entire army to follow Brackenbury and retreat before the battle even starts.
* At the end of the second ''Reiko the Zombie Shop'' movie adaptation, the title heroine confronts the bad guy who intends to resurrect the witch who was killed by Reiko in the first movie. The bad guy is at Reiko's mercy and she's armed with a dagger, so what do you think she does? Stab him? Wrong! She uses her trademark power to turn his victims (including a cop) into zombies who attacks the bad guy AND Reiko, then she grabs the zombie cop's gun and shot the bad guy to death, only to discover that by turning the victims into zombies, she also resurrected the witch who escaped while she was fighting. But wait, there's more: the last scene reveals that after Reiko left, the witch resurrected the bad guy and they are now working together. And guess what's worse? This cliffhanger is never resolved! The third and last movie adaptation deals about a different story, so we are left to assume that the two evildoers are still at large, thanks to Reiko being too dumb to use a dagger!
* At the end of ''Film/TheRing'', we find out that not only has the creepy girl from the well not been defeated, she's actually been released to reign terror upon the rest of the world. Plus she never sleeps, so it's not like we'll be getting a daily eight hour break from the reign of terror.
* In the American/Japanese science fiction/monster flick ''Film/TheGreenSlime'', the space station becomes infested with monsters made of the titular stuff because a visiting {{Jerkass}}/TheKirk had smashed on the ground an unauthorized sample of mold taken from an asteroid. He'd done this within a huddle of other astronauts, so naturally a fragment of the container (complete with a blop of slime) gets caught in one of the astronauts' pant-leg, and it naturally feeds on the radiation during the decontamination process.
* ''Film/JurassicPark'':
** After Nedry shuts down the fences to steal the embryos and make his escape, the TyrannosaurusRex gets out and wreaks havoc. In order to undo what Nedry has done, Hammond wants the computers shut down and restarted. When [[Creator/SamuelLJackson Ray Arnold]] initially refuses, Hammond insists: "People are dying. Would you ''please'' shut down the system." Arnold does so. Nedry was smart enough to program the raptor fences to stay operational during his sabotage; the total system shutdown releases the Velociraptors. Prior to this, the ''T. Rex'' had only killed one person and likely preferred snacking on its fellow dinosaurs as opposed to stringy, bony humans; the raptors kill two humans [[ForTheEvulz for the simple sport of it]], and relentlessly pursue the main characters for the rest of the film.
** When the ''T. rex'' breaks out and attacks the kids, Dr. Grant gets its attention with a flare and then throws it away, causing the ''T. rex'' to forget about the kids and chase after the flare. So far, so good, except Ian Malcolm tries to help with his own flare, which only causes the ''T. rex'''s attention to be turned back to the people instead of Grant's flare. Malcolm's own attempt to throw the flare away doesn't work because he's running while doing so, so the ''T. rex'' focuses on the larger moving target. The result is that it keeps chasing him, leading to Malcolm being injured and Gennaro killed.
** Also the [[DesignatedHero heroes]] of [[Film/TheLostWorldJurassicPark the sequel]], who are responsible for many of the deaths in the movie.
** And yet again in ''Film/JurassicWorld'', in which all the carnage is the result of a series of unfortunate events beginning with the supposed hero accidentally letting the ''Indominus rex'' out of its enclosure because he wasn't willing to wait five minutes for his boss to check its tracker.
* In ''Film/TheCabinInTheWoods'', when the heroes successfully stop the Evil Plan, they find the results [[spoiler:{{Eldritch Abomination}}s destroy the world without their once-a-year sacrifices]] fall under this trope.
* In ''Film/BigGame'', [[spoiler:Herbert is brought to National Security Vault to advise on saving the president.]] The person who had this brilliant idea has just unwittingly put TheMole in place where he can do the most damage.
* ''Franchise/{{Hellboy}}'':
** At the end of ''Film/Hellboy2004'', the titular AntiAntiChrist kills the villain [[UsefulNotes/RasputinTheMadMonk Rasputin]]... only for a ''very'' huge and scary tentacle monster to [[OneWingedAngel pop out of his dead body]]. Luckily, he manages to drive out the abomination.
** In ''Film/Hellboy2019'', when Hellboy, in his desire to [[spoiler:avenge his father's death, pulls Excalibur from its stone and thus turns into the Destroyer Of All Things, his transformation opens the gates of Hell and unleashes scores of murderous demons on London's civilian populace. It lasts only a minute or two at most, but that's enough to result in countless extremely violent deaths among innocent bystanders. It's downplayed, however, because Excalibur was Hellboy's only option to defeat Nimue for real]].
* In ''Film/{{Speed}}'', while under the bus in a failed attempt to disarm the bomb, Jack has to punch a hole in the bus's gas tank with his screwdriver as a makeshift grip to keep himself off the ground to avoid being run over when his cart breaks. By causing the leak, Jack has now significantly cut down the time he and the LAPD have in trying to find a solution to end the crisis. When he informs driver Annie about it once safely in the bus, she replies in a panic, "What, did you feel like you needed another challenge?!"
** Also, when the injured driver is being evacuated, the police on the flatbed try to get an old woman on the bus to come too, despite warnings from the bomber that he won't allow it. She [[spoiler:tries to leave, but a bomb is triggered beneath her feet, dropping her under the wheels of the bus.]]
* During the climax of ''Film/{{Dogma}}'', the fallen angel Bartleby needs to become human so he can take advantage of [[http://en.wikipedia.org/wiki/indulgence plenary indulgence]] in order to return to Heaven. Thus proving God wrong and thereby unmaking all of creation. To do so, he needs to remove his wings... which is promptly done for him with a machine gun by a particularly clueless hero who was trying to kill him.
* Every protagonist from the ''Franchise/{{Saw}}'' films (with the exception of ''Film/SawI'' and ''Film/SawVI'') suffers from this, the worst case being Matt Gibson from ''Film/Saw3D''.
* In ''Film/{{Immortals}}'', Theseus acquires the [[ChekhovsGun Epirus Bow]], but shortly after getting it, [[spoiler: he drops it. The weapon is then taken by a dog (don't ask) and delivered to the BigBad, who then uses it to ''great'' advantage. Had it not been for the gods' BigDamnHeroes moment at the end, his evil plans would've succeeded entirely.]]
* In ''Film/TheMatrixReloaded'', Neo encounters the Architect on his journey to destroy The Matrix. He learns that, if he proceeds, every man, woman, and child connected to the Matrix would die, which, combined with the destruction of the rebellion, would be TheEndOfTheWorldAsWeKnowIt. Neo does it anyway. It got better, though.
** By the way, Neo destroyed [[BigBad Agent Smith]] in the first movie; however, the latter came back as a rebellious program.
*** We find from the final film, this was really a BatmanGambit by [[spoiler:The Oracle]], so Neo was filling his role exactly as intended.
* The film version of ''Film/HarryPotterAndTheOrderOfThePhoenix'' has a tragic example of this. Harry runs to his godfather's rescue [[spoiler:only to be the cause of Sirius's demise]]. [[FamousLastWords "Nice one, James."]].
** Also, in ''Film/HarryPotterAndThePhilosophersStone'' since Dumbledore had enchanted [[spoiler: The Mirror of Erised to only give the stone to someone who didn't want to use it]] Voldemort couldn't have retrieved it until Harry showed up and [[spoiler: the stone appeared in his pocket]]. Furthermore, since Voldemort couldn't get the stone anyway, Harry and his friends' quest to stop Voldemort was unnecessary and they put their lives in danger for nothing. Actually, all they did was kill Quirrel.
*** Not just that, they set off an order of events that would eventually lead to Harry's own death (and every other death in the series). Voldemort was stuck in Quirrel, living a half life, he wasn't exactly thriving. By beating him in that form at that time he didn't allow Dumbledore time to find his horcruxes (which would have prevented him from respawning) and opened the door for him to come back as a complete (more or less) being '''and''' lose his inability to touch Harry. And it's not like Voldemort could've got the stone since even if he got wise and tried to use someone else to get it with the Imperius curse, they still wouldn't be able to get it because the second he tells them to get it they will want to get it and will therefore not be able to get it. He was stuck in that form and Harry did him a huge solid.
* In ''Film/{{Frequency}}'', John manages to use the [[AppliedPhlebotinum time-travel radio]] to keep his father, Frank, from dying in the burning building that had claimed his life thirty years ago. And so doing began a chain of events that caused a SerialKiller to live instead of die who then goes on to murder many more women including John's mother. Oh, and did I mention Frank still dies from lung cancer because he smokes?
** The rest of the movie is spent trying to stop the serial killer from killing his other victims, including Frank's wife. [[spoiler:In the end, the killer, who is still at large in the present, breaks into John's house and attacks him while John's talking to his father on the radio. Right as it looks like he's going to win, in walks a thirty-year-older Frank with a shotgun. He'd heard the fight on the radio, and thus knew exactly where the killer was going to be thirty years from now]].
* The whole plot of ''Film/TheButterflyEffect'' is a series of these.
* ''Film/TheDarkKnightTrilogy'' by Creator/ChristopherNolan could almost codify this trope.
** In ''Film/BatmanBegins'', Bruce Wayne's desire for justice for Gotham leads him on a personal quest where he's declared dead, leaving Wayne Industries in the business of (among other things) weapons development. One device of Wayne Tech is stolen and used against the city. If Bruce had managed his company, that device might have never been made.
** ''Film/TheDarkKnight'': Franchise/{{Batman}}'s destruction of the Falcone family's dominance of Gotham City leads to not only a myriad of gangs trying to fill the gap, [[spoiler:but also the rise of ComicBook/TheJoker, who creates far more chaos and destruction.]] There are obvious real life parallels to international politics to when a power vacuum is created (collapse of the Soviet Union leading to rise of nationalism and fundamentalism) and law enforcement (the weakening of the Mafia that clears the way for Chinese, Russian, or Columbian gangs, for instance).
*** After Reese has run some numbers, Lucius Fox makes him do it all over again to teach him a lesson. This second, closer look leads to Reese discovering the identity of the Batman.
** ''Film/TheDarkKnightRises'': [[spoiler: Bruce Wayne dilly-dallies with nuclear fusion technology as an energy source, not realizing he was manipulated to do this to create a fusion bomb by remnants of the League of Shadows.]]
** Bruce choosing Miranda to be in charge of the fusion reactor project, unaware that [[spoiler:she is actually Talia Al Ghul]], which grants her [[spoiler: the possibility of flooding the basement to completely give the heroes no chance of ever stopping the bomb in the first place.]]
** The whole plot of ''Film/TheDarkKnightRises'' is because Bruce "let Ducard/Ra's die" in ''Film/BatmanBegins''. [[spoiler:Talia, who used to have a rather strained relationship with her father prior to that, then seeks to accomplish her father's visions]].
* Happens in ''Film/Batman1989'' as well with the Joker's backstory, though to be fair it really was an accident and Batsy [[ThouShallNotKill wasn't intentionally trying to send Jack Napier over the railing]], and in fact [[SaveTheVillain actually tried to save him]] from falling into the vat of chemicals that would lead to him becoming the Joker. During their final confrontation, Joker points out that [[CreateYourOwnVillain "you made me".]]
* ''Franchise/PlanetOfTheApes'': The original had an astronaut landing in the future from a freak accident. The [[Film/PlanetOfTheApes2001 remake]] has the hero '''causing''' the freak accident that launches his ship even further back in time and giving his mutant lab apes free rein over a primitive world. Changes things considerably.
** ''Film/RiseOfThePlanetOfTheApes'' could have been called "Nice Job Breaking It Hero: TheMovie". [[spoiler: In his attempt to create an Alzheimer's cure, Will sets into motion the eventual dominance of the apes, as well as inadvertently creating the plague that wipes out most of humanity.]]
* Creator/JohnWoo's ''[[Film/BrokenArrow1996 Broken Arrow]]'' sees the hero finding a nuclear warhead which the villain has left in a mine. It hasn't been armed yet, so he comes up with the idea to enter the wrong arming code three times, causing a security measure to lock the warhead so it can't be armed. He does so...only for the villain to mockingly inform him that he used uncoded circuit boards, "You have just armed a nuclear warhead, my friend." Oops.
* At a fairly early point in ''Film/ReturnToOz,'' Dorothy mentions that the [[MacGuffin Ruby Slippers]] fell off her feet during her flight back to Kansas, and apparently thought nothing more of them after that. During the climax, the Nome King takes [[KickTheDog great delight in telling Dorothy what happened because of this]]:
-->'''Dorothy:''' My ruby slippers--\\
'''The Nome King:''' No, no, no... ''My'' ruby slippers. They just fell out of the sky one day -- you were so anxious to get home! They're very powerful: they made it possible for me to conquer the Emerald City... thank you.
* Near the end of ''The Haunting in Connecticut'', the reverend manages to exorcise the ghost from the house. [[spoiler: Too bad he's a benevolent spirit who was preventing the dozens of malicious ghosts from wreaking havoc.]]
* In ''The Monitors'', after the heroes drive off the dictatorial machines that enslaved mankind and stopped all human conflict, wars start breaking out all over the place.
* ''Film/JamesBond'':
** In ''Film/DiamondsAreForever'':
--->'''Tiffany''': I did it, I switched the tape in the machine.
--->'''Bond''': You stupid twit, you put the ''real'' one back in!
** In ''Film/LicenceToKill'', Bond's RoaringRampageOfRevenge ends up screwing up the actual plans other law enforcement agencies had in place, and gets a lot of them killed.
** In ''Film/{{Skyfall}}'', M gave Silva to the Chinese to save 6 agents, but in the process caused Silva's StartOfDarkness, leading him to kill dozens of [=MI6=] staff later on. Also, Q's attempt to decrypt Silva's computer by plugging it into [=MI6's=] network ends up [[spoiler: releasing a virus that opens every door in [=MI6=]'s new base, allowing Silva to escape.]]
** In ''Film/{{Spectre}}'', Bond's conversation with Mr. White implies that SPECTRE is a reformed QUANTUM, the [[NebulousEvilOrganization crime organization]] from the first two Creator/DanielCraig films, after Bond destroyed much of its leadership in ''Film/QuantumOfSolace''.
* In ''Film/FridayThe13thPartVIJasonLives'', Tommy Jarvis, [[NoKillLikeOverkill just to be absolutely sure]], digs up Jason Voorhees' corpse, and impales it with a steel rod. Cue [[LightningCanDoAnything freak lightning bolt]], which resurrects him as an unstoppable zombie.
* The FridgeLogic in ''Film/TenThousandBC'' sets in that, you know, D'leh and his buddies destroyed one of the only BASTIONS OF CIVILIZATION and set humanity back god knows how long. [[ValuesDissonance A few sacrifices isn't that much of a price to pay]].
* At the end of ''Annihilation: Earth'', David is torn between his idea of shutting down the particle colliders to stop the apocalypse or turning them UpToEleven, as his Middle Eastern colleague Raja suggests, which will (supposedly) force the anomaly to be "snuffed out." His boss makes him doubt Raja's motives, and David ends up going with his original plan. Cue the literal EarthShatteringKaboom. The moral of the story: not all Arabs are terrorists.
* ''Film/TheHungerGamesMockingjayPart1'' has Katniss tearfully telling the cameras that the Capitol was responsible for the destruction of a hospital full of innocents. While the Capitol planes were showing aggression, it was actually Katniss and Gale who shot down the planes, causing them to smash into the hospital and completely destroy it.
* In ''Film/{{Dragonheart}}'', the knight Bowen is reluctant to kill Draco, even though it's the only way to save the kingdom from its AxCrazy king Einon, because Draco is the last dragon left in the world. Whose fault is that, might you ask? Why, Bowen's, who spent ten years on a personal crusade to wipe out the species!
** Eh, that was part of it, the other part being that Draco had become his best friend. See how eager you are to kill YOUR best friend when the chips are down. No, the real hero who did the breaking is Draco himself, by giving half his heart to a monomaniacal JerkAss he created an immortal dictator that made life a misery for his subjects.
** The Chinese in the sequel. First, they slaughter all their dragons because one of them turned out to be bad (whom the others immediately stopped and punished). Then they take the heart of the bad dragon to England, which results in the BigBad (the same dragon) restoring his original form.
* This trope kicks off ''{{Dracula}} Has Risen From His Grave'', in which a couple of priests go to Dracula's castle to exorcise any lingering evil left over from the previous Creator/ChristopherLee Dracula flick. One of the pair slips and falls on some rocks, and blood from his resulting scalp wound drips down to where Dracula's inert body is lying, reviving the vampire for another round of mayhem.
* ''Film/HeroicTrio'' sees an evil sorcerer kidnapping babies to raise as an evil army. One of the main characters kidnaps a baby in order to lure the real kidnapper out. This results in a fight between a fellow hero who [[LetsYouAndHimFight mistakes her for a villain]] and to make matters [[FromBadToWorse worse]], the real kidnapper shows up to fight both of them. The baby ends up dying in the process.
* ''Film/Tremors2Aftershocks'': While trying to escape shriekers, the 1st evolution stage of a graboid, they come across one in the way to an escape truck. So Burt Gummer, resident gun nut, whips out a {{BFG}} and blows it to [[LudicrousGibs bits.]] The problem? He was prepared to shoot at an underground creature, not the small above-ground shrieker. The bullet from the gun goes through the shrieker, a wall, several barrels of oil, and finally, the truck's engine. Burt's response? "How could I have known?!" [[note]]He ''couldn't'' have known. The shrieker was in front of a concrete wall.[[/note]]
* In ''Film/TheMummyTombOfTheDragonEmperor'', Lin, who had been the guardian of the tomb and tried to prevent the emperor from escaping, was responsible for knocking the diamond into the emperor that awakes him as she attempts to attack his decoy.
* In ''Film/TwentyEightDaysLater'', an AnimalWrongsGroup releases the Rage Virus when trying to free some filthy monkeys. This is ''after'' they are directly told by ''a scientist'' that the monkey "is infected with 'rage' and all it takes is one bite".
* The rampant idiocy of the cast of ''Film/TwentyEightWeeksLater'' makes those guys look ''intelligent''. First the SwissCheeseSecurity of the compound allows people to leave the safe zone at will, leading to the discovery of a virus carrier that, [[WhatAnIdiot for some reason]], they bring into the safe zone and leave in an unlocked room with no guards to speak of. When someone inevitably gets infected, their "logical" decision is to herd the population into a poorly guarded room and shut all the lights off. Naturally, it gets worse when it leads to nearly everyone dead or infected. Then at the end, [[spoiler: the boy becomes a carrier and his sister [[TooDumbToLive neglects to ''tell'' anyone]], which results in the infection decimating France and possibly all of mainland Europe.]]
* In ''Film/{{Blade}}'', the hero doesn't kill Quin completely, allowing him to revive himself in a hospital to turn Karen and kill her boyfriend. Since Blade shows up immediately after this happens, looking for Quinn, he apparently knew that Quinn wasn't dead. His reasons for leaving Quinn alive in the first place are never explained, leaving a plot hole.
* ''Film/TransformersDarkOfTheMoon'': If Optimus Prime hadn't discovered the ''Ark'' on the moon, he wouldn't have been able to use the Matrix to revive Sentinel, allowing the traitor to kill Ironhide, steal back the Space Bridge Pillars, and join Megatron and work on enslaving humanity as a labor force to rebuild Cybertron.
---> Charlotte Mearing: (''After Sentinel ruins the NEST Base.'') ''"Yeah, take a good look, Optimus! This is all on you!"''
* In ''Film/{{Legend 1985}}'', one of the "heroes", Lily, breaks it by [[spoiler: touching a unicorn, even after Jack tells her not to, resulting in the ice death of the world. It gets better. Eventually.]]
* In ''Film/{{Insidious}}'', the twist ending is revealed when [[spoiler:Elise takes Josh's photo, dooming herself and most likely Renai as well. On second thought, Josh is guilty of this as well.]]
* In ''Film/MemphisBelle'', the co-pilot begs for a chance to take some shots at the attacking German fighters, and is elated when he downs one of them ... only to watch in horror as it crashes straight into the tail of the rookie crew's bomber.
* In ''Film/{{Men In Black II}}'', J neuralyses Newton at the video store, and gives him an instruction to not live with his mother, as he was a middle-aged man. It is heavily implied (by him calling for his mother while brandishing a shovel) that he kills her to follow this instruction from J.
* In ''Film/IAmLegend'', Dr. Alice Kripin creates a mutated strain of the Measles virus which cures cancer ... and then promptly mutates again into a much worse virus that wipes out 90% of the human race and causes 99% of the survivors to be mutated into excessively violent vampire/zombie creatures which then slaughter all but a handful of the remaining uninfected people.
* The 2012 ''Film/TheThreeStooges'' film is about the trio trying to raise $830,000 their orphanage is in debt for. It's later revealed that they're in debt because of [[spoiler: insurance bills caused by injuries from their antics over the years]].
* In ''Recap/MysteryScienceTheater3000TheMovie'', Mike is goaded by Crow and Tom to pilot the Satellite of Love, despite being warned by Gypsy not to do so. Mike brushes her off, starts it off smoothly... then promptly runs into the Hubble Telescope. Then he tries to pull it off with the manipulator arms, tearing a part of it off wiping sweat off his forehead. When he finally releases, it suddenly drops to Earth as a fireball! Mike {{lampshade|Hanging}}s the improbability of the last one.
* ''Film/{{Flash Gordon|1980}}''
** Ming claims to only destroy planets that are advanced enough to realize his attacks aren't natural disasters...hence, it's Zarkov's own attempt to contact whoever was launching the attacks that nearly dooms the Earth.
** Zarkov also gets Flash killed. Good going. Flash [[OnlyMostlyDead gets better]] though.
* The fact-based drama ''Film/{{Amen}}'' about Kurt Gerstein, a member of the [[ThoseWackyNazis SS]] who develops and mass produces Zyklon B for use in Poland. [[MyGodWhatHaveIDone Then he finds out]] [[HeelRealization exactly what the SS meant by]] ''[[DeadlyEuphemism pest control]]''.
* Marty [=McFly=] of ''Franchise/BackToTheFuture'' can't go one movie without doing this trope:
** [[Film/BackToTheFuture First film]]: Saves his dad from getting hit by a car--- which as a result keeps his parents from meeting, and in turn, is causing himself and his siblings to slowly be erased from existence.
** [[Film/BackToTheFuturePartII Second film]]: Purchases [[TimelineAlteringMacGuffin a sports almanac]]--- which {{Bi|gBad}}ff steals and delivers to his past self in 1955, allowing a new power hungry Biff to turn the post-1955 era into a BadFuture. And in another case of breaking things, Biff managed to use the Delorean to go back to the past just because Marty happened to be looking away from it for a few minutes. Also an example for Doc Brown, who forced Marty to throw away the Almanac allowing Biff to find it.
** [[Film/BackToTheFuturePartIII Third film]]: Saves Doc Brown from getting killed by "Mad Dog" Tannen--- and now changes history so that he'll be the one getting killed instead.
* At the end of ''Film/{{Excision}}'', Pauline tries to [[spoiler:perform a lung transplant for her IllGirl sister Grace. It goes about as well as you can expect for a complicated procedure performed by someone with no medical training, little proper equipment, and a garage for an operating room.]]
* See NiceJobBreakingItHero/MarvelCinematicUniverse
* In ''Film/StarTrekIntoDarkness'', Kirk stuns a creature that appears before him as he runs from a planet's natives, only for Bones to tell him that the creature was their ride out.
** Furthermore, Kirk's lust for revenge is what ultimately [[spoiler:dooms the ''Enterprise'']]. If he had not desired vengeance against Harrison, there would have been no eventual confrontation with the ''Vengeance''. He wanted vengeance and he got it. [[spoiler:The ''Vengeance'''s merciless assault is what inspires his heartfelt apology to his crew, as seen in the trailer]].
** [[spoiler:Khan's decision to crash the ''Vengeance'' into San Francisco and kill countless innocents was probably influenced at least partly by the fact that Spock had tricked him into believing that all of his crew were killed]].
** Admiral Marcus points out briefly that landing in Klingon territory and taking out several patrols (even in self defense) will still draw the wrath of the Klingons against the Federation. [[spoiler:Even though this was his goal to begin with. It's implied this is the reason why the two are hostile to each other during the 5-year expedition of the ''Enterprise'', which starts at the end of the film]].
** As a furious Scotty points out, by confiscating his transwarp equation, Starfleet inadvertently ended up allowing [[spoiler: a rogue Starfleet officer to commit a terrorist attack and then jump across half the universe to safety]].
* ''Franchise/DCExtendedUniverse'':
** ''Film/ManOfSteel'':
*** When Clark tells Zod [[spoiler: how he managed to control his super-senses, Zod is able to make use of the information to become ''that much more dangerous''.]]
*** When Clark begins exploring the [[spoiler: Kryptonian spacecraft he finds in the Artic, he inadvertently sets off a beacon that alerts Zod and his followers to the presence of Earth.]]
*** ''Every decision'' made by any Kryptonian who is not Zod in the opening sequence is an example of this: Jor-El stealing the codex, which did nothing but give Zod a reason to go looking for it. [[IllNeverTellYouWhatImTellingYou Jor-El telling Zod that Kal-El and the codex are on the rocket he just fired off]]. The council [[CruelMercy imprisoning Zod and his allies in the Phantom Zone]] when they know their planet is doomed, anyway.
** ''Film/BatmanVSupermanDawnOfJustice'': Superman [[spoiler:overpowers Doomsday and drags him into space, where they can fight without hurting anyone]]. The President decides to launch a nuke at them, ignoring General Swanwick's protests that Superman has the situation well in hand. The end result, [[spoiler:Superman gets knocked out and nearly killed, while the explosion knocks Doomsday back to Earth and makes him more powerful.]]
* In ''Film/PacificRim'', [[spoiler: Newton drifts with a partial {{kaiju}} brain, and learns that the kaiju operate on a hive mind and are being engineered. Unfortunately, he forgot that the drift works both ways, meaning the kaiju hivemind now know what he knows.]]
** Also Stacker Pentecost grounding Gypsy Danger is what probably cost the lives of the two jaeger crews that died in the first double kaiju attack. If he had let the go out right away it's likely that all four of the last jaegers would have survived.
* In ''[[Film/PercyJacksonAndTheOlympians The Lightning Thief]]'', Percy slices off the Hydra's heads, not knowing that it would come back with ten instead of five.
* ''Franchise/{{Godzilla}}'':
** ''Film/{{Godzilla 2014}}'':
*** The train carrying the nuclear warheads meant to take out the [=MUTO=]s is ambushed by a [=MUTO=], who promptly eats one of them.
*** The Navy accidentally provoke Godzilla into destroy the Golden Gate Bridge.
*** Godzilla stops the flying Muto with a quick tail swipe into a tall building...which then collapses on top of him.
** In ''Film/ShinGodzilla'', the US Armed Forces come to the JSDF's aid--and screw things up ''really badly''. How bad? Godzilla's reaction to bunker busters wounding him is to unleash his Atomic Breath for the first time, irradiating half of Tokyo and [[spoiler:killing the Prime Minister and most of the Cabinet when they try to leave the city For that matter, Rondo gets one for talking the Prime Minister into evacuating during said attack, putting him in the path of the Atomic Breath blast.]]
** In ''Film/TheReturnOfGodzilla'' the Soviets aren't exactly portrayed as the "good guys" in either the Japanese or US cuts, but the nuke they launch on Tokyo (accidentally in the Japanese cut, and on purpose in the US version) would've wiped out Tokyo had the US not intercepted it in orbit. Even then, fallout from the missile's detonation is enough to rejuvenate Godzilla and allow him to kill the ''Super-X''.
** In the original ''Film/Godzilla1954'', Dr. Serizawa expressed the fear that revealing the Oxygen Destroyer's existence would result in a threat worse than nuclear weapons before he uses it on the original Godzilla. ''Film/GodzillaVsDestoroyah'' sees that the good doctor himself unintentionally realized his own fears as the eponymous Destoroyah was created by the weapon's use against the first Godzilla.
* ''Film/TheDistinguishedGentleman'': The protagonist is a ConMan who's just scammed his way into Congress. The first time he votes, he doesn't even bother to find out what it's for, since he's having too much fun just being there. On a whim, he pushes "No". Then he encounters a public tour whose guide asks him about his vote and confronts him with the knowledge that it was a welfare bill. Oops.
* ''Film/ResidentEvil'': Alice and the assault team manages to shut down the Red Queen, only to realize that the Red Queen was attempting to contain the T-Virus infection within the Hive, and that they have now released hundreds of zombified animals and people into the facility.
* ''Film/TheWolfman2010'':
** [[spoiler:Gwen stops Aberline from shooting Lawrence, which in turn causes him to get bitten. However, this really doesn't do much good since Gwen ends up shooting Lawrence herself in the end. Although, she's somewhat justified since she was still convinced she could reach Lawrence, and well... [[IKnowYouAreInThereSomewhereFight she was right]]. Plus, she probably figured that Lawrence would have finished off Aberline instead of chasing after her instead.]]
** [[spoiler: Whilst in the Hindu Kush, the locals who told Sir John about the feral child in the cave, thus causing him to get infected.]]
* ''Film/XMenFilmSeries'':
** ''Film/X2XMenUnited'': Rogue's impatience makes her indirectly responsible for [[spoiler:Jean's death]], due to crashing the X-Jet and causing the vertical takeoff to go temporarily offline. Furthermore, since the jet appears to have been only about a few hundred meters from the facility, she really didn't need to fly to pick them up ''anyway''.
** ''Film/XMenFirstClass'':
*** Charles trains Erik, helping him to improve his power. This backfires when the latter decides to turn into Magneto.
*** Had Charles and Hank shown acceptance for Raven's true form, she might not have teamed up with Magneto.
*** Moira desperately [[spoiler:shoots at Erik, forcing him to deflect the bullets, one of which paralyzes Charles right next to him]].
*** Charles [[spoiler:erases Moira's memory, clearly discrediting her within the CIA and possibly ruining her career. The fact that one of the few snatches of memory she has left is of their kiss is just the icing on the cake.]]
** ''Film/XMenDaysOfFuturePast'':
*** [[spoiler:The heroes' decision to break Magneto out ultimately does more harm than good. Given Mystique's reaction to Charles's presence, it seems leaving Erik in prison would have saved a lot of problems. It's even lampshaded by Xavier when he tells Logan, "It was a mistake freeing Erik."]]
*** [[spoiler:Magneto tries to kill Mystique because the medical experiments performed on her]] were used to give the future Sentinels their adaptive abilities. However, this attempt [[spoiler:spills her blood, allowing it to be collected and sent to Trask Industries]]. Subverted in that Trask [[spoiler:still needs the living specimen]].
*** Depending on how you interpret TheStinger, it seems that [[spoiler: in preventing the BadFuture, the X-Men have somehow inadvertently set the stage for Apocalypse to rise up and attack mankind in the new timeline]].
** ''Film/XMenApocalypse'':
*** The cultists had managed to locate En Sabah Nur's resting place, but they have made no progress in reviving him... until Moira left the entrance to the cave uncovered, allowing the sunlight in to power the machinery and waking Apocalypse.
*** Xavier's conversation with Magneto via Cerebro makes [[spoiler:Apocalypse aware of the telepath's existence and he taps into the latter's powers]].
*** [[spoiler:Havok's attempt at saving the Professor from Apocalypse only manages to blow up a generator under the school, causing a huge explosion. Thanks to Quicksilver, the only casualty ends up being Havok himself, being the closest to the blast.]]
* ''Film/{{Transcendence}}'':
** It's made clear during the climax that [[spoiler: the AI was Will all along and all he wanted to do was fulfill his wife's dream of using technology to heal the planet. Had the Government not interfered, as well as Evelyn not give into her doubts, Will would have created paradise on earth. "Humans fear what they don't understand." Instead much of humanity is sent back to the Stone Age and countless millions likely died in process.]]
** Max actually sides with the people that murdered Will to stop the machine impersonating him. [[spoiler: They only succeed because RIFT threaten to kill Max unless Will destroys himself, a plan that only works because it's genuinely Will. Essentially Max enables RIFT to kill both his best friends and end a chance at a better world.]]
* In ''Film/StreetFighter'', we have Carlos Blanka who's been captured by [[BigBad M. Bison]] and what does Colonel Guile do? Tell good old Charlie to "hang on buddy" ''right in front of Bison!'' Way to tell the deranged lunatic who has a personal investment in you that he has your friend ''right there'' and at his mercy. [[MindRape Guess]] [[PlayingWithSyringes what]] [[BrainwashedAndCrazy Charlie's]] [[BioAugmentation fate]] [[WasOnceAMan is]].
* In ''Film/StVincent2014'', aside from hanging out with a prostitute, Vincent took Oliver to a racetrack and a bar while babysitting him. This ends up costing Oliver’s mother half-custody when Oliver’s father takes her to court.
* In ''Film/{{Pixels}}'', one of the Arcaders uses cheat codes to win against Pac-Man, but all it succeeds in is enraging the aliens and speeding up the destruction of Earth.
* In ''Film/FollowTheFleet,'' Bake goes to a theatrical producer to try to get Sherry an audition for a show. He hears that the producer is already auditioning someone he really likes for the part, so Bake sabotages the unknown performer. What he doesn't realize is that Sherry has gotten an audition on her own, so she's the one he's sabotaging.
* In ''Film/TheLastWitchHunter'', while certainly effective, Axe and Cross seems to have problems with this.
** They never once mention to Kaulder that [[spoiler:the Witch Queen's heart is still alive, which could have kept him aware of possibility that it may be used to bring her back one day]], which is ''exactly what happens''.
** While the above is bad enough, the fact that they [[spoiler:withhold the little fact of the heart being stolen]], thus stunting Kaulder's investigation until it's too late, smacks of idiocy.
** At some point, they switched from killing dangerous witches on spot to arresting them. While humanitarian and commendable, this creates world's most powerful coven for the Witch Queen to use for her spell.
* The movie ''Film/ToySoldiers'' has a scene where [[spoiler: [[Creator/WilWheaton Joey]], one of the students, killed]] when he tries to inspire a revolution against the Colombians holding the students hostage. This causes the villain's plot to implode, thereby placing the student body in danger because [[spoiler: Joey's father, TheDon, orders the murder of [[BigBad Cali's]] father during a prison riot. Since Cali is holding the students hostage in exchange for his father, he orders the murder of the students as soon as he finds out.]]
* In ''Film/{{Ghostbusters 1984}}'', at the climax, Gozer demands that the Ghostbusters pick the form of The Destroyer, Gozer's instrument to kill all life on Earth. Peter, Egon, and Winston all manage to keep from thinking of anything, but poor Ray had an idea - the most innocent thing he could think of from his childhood - the Stay-Puft Marshmallow Man. Cue 100-foot tall marshmallow golem rampaging through New York.
* Film/RockyII: Rocky as the movie progress faces serious financial issues and has to accept the rematch with Apollo despite the concern he could potentially go blind if he suffers serious damage. All of this could have easily been avoided had Rocky not been so irresponsible with his money and blew it all away on things like motorcycles and jackets. Adrian at one point even tried to talk Rocky out of buying expensive jewelry for her so they could save money, but he would not listen nor did he bother to listen to Gonzo's advice about investing the money he made.
* ''Film/DeepCover'': After undercover cop Russell Stevens sets up a deal with drug kingpin Hector Guzman to record the transaction, he is followed by a local narcotics detective who scares off Guzman and almost sabotages the whole thing.
* In the 2007 film adaption of ''Film/{{Hairspray}}'', when Tracy participates in the march and hits a cop on the head with her sign and runs away, it gives Velma a good opportunity to stop Tracy from participating in the pageant by having the same police guard the entrance,[[spoiler: making Tracy and the others devise a plan to sneak into the pageant. If Tracy had been bailed out along with Maybelle, she wouldn't have had to hide from the cops and sneak into the pageant!]]
* ''Film/BlueMonkey'': The entire thing is caused thanks to some [[FreeRangeChildren stupid kids]] feeding a parasitic insect a bottle of powdered growth hormone. Up until then, there was only one casualty (the man initially infected with the thing), and the bug was safely contained in a jar. But after eating the hormone the kids give it, the thing grows bigger than a normal human and ends up siring more of its kind. The kids are consequently indirectly responsible the deaths of the nurse who'd been watching the specimen, her boyfriend and several other patients and staff.
** Admittedly, the nurse herself is just as much to blame; the kids wouldn't have been able to have access to the specimen if she hadn't snuck off with her boyfriend to have sex right before they came in.
* {{Film/Snowpiercer}}: The protagonist himself does this twice. First by going on with the revolt which turns out to have been engineered by the train conductor as a way to cull the population and keep the train balanced, and going too far with that ending in more deaths than expected/needed, then again when he tries to intervene and help lil Timmy, which costs the other boy to sacrifice himself to keep the engine going. Then more egregiously the good guys epically mess up by blowing up the side door to the train, which causes an avalanche to cave in and derail the majority of the train, specifically the rear end, where the protagonist and his people have been suffering and trying to leave since the start of the movie.. at the end of the movie the protagonist is dead and while it's not confirmed whether all the other passengers died (except for the girl and the kid) the hero's people are definitely goners, and the train is in bad shape, and the majority of the people are potentially dead, and the only guy who knew how to survive outside is definitely dead, and there's a good chance the only living beings on the planet are a teenage girl, a little boy and a polar bear. You can guess how well that's gonna go for the humans.
** Also done before the movie begins by the scientists who fired into the sky a special missile with a gas meant to reverse global warming. It worked...and caused a new ice age.
* The US Air Force only made things worse in ''Film/ShinGodzilla'' as it's implied Godzilla developed his atomic breath as a result of bunker busters injuring him, where he not only destroyed the bombers, but also lays waste to much of Tokyo and [[spoiler:kills the Prime Minister and much of the Cabinet when their helicopter gets caught in its blast.]]
* ''Franchise/StarWars:''
** ''Film/RevengeOfTheSith''
*** Yoda may have been a great military commander, but he sucked as an emotional counselor. In RealLife, it has been known since time immemorial that platitudes, no matter how well-meant, fall flat on the hurting. Unfortunately, platitudes were all Yoda had for a worried Anakin Skywalker. [[BigBad Darth Sidious]] promised actual help...
*** [[WesternAnimation/StarWarsTheCloneWars Even before that]], Yoda decided to give Anakin a padawan because he believed that training a Jedi until she was fully able to take care of herself would help Anakin learn to let go of his loved ones, freeing him from the fear of loss that could lead him to the Dark Side. Unfortunately, Yoda couldn't anticipate that Ahsoka would [[spoiler: choose to leave the Order before her training was complete]], which only ''increased'' Anakin's fear of loss and inability to let go, pushing him ''closer'' to the Dark Side.
** ''Film/TheLastJedi'' has one of the biggest examples in all of ''Star Wars''.
*** Convinced that Holdo is just ready to take the fleet and fly off, Poe agrees to secretly let Finn and Rose go on a mission to find a splicer, get on the First Order main ship and deactivate the sensors letting them track the Rebel fleet through hyperspace. When Holdo seems ready to go, Poe leads a mutiny to stop her. At which point, [[spoiler: Leia herself knocks Poe out and when he comes too, she tells him that Holdo was following her plan: send transports with the 500 Rebels cloaked from sensors and settle on a hidden base on a nearby planet. The cruiser will go on to lead the First Order away, unaware they're chasing a ghost ship. Holdo wasn't a coward, she was doing exactly what Leia would have.]]
*** Which really ends up blowing up in everyone's faces as [[spoiler: Rose and Finn are caught before they can destroy the device. Then that "charming rogue" splicer not only sells them out in a heartbeat but also gives the First Order codes to track the transports. They soon destroy nearly the entire fleeing fleet and are only stopped by Holdo ramming the cruiser into their ship in hyperspace. But between that attack and a follow-up battle at the now-discovered base, a strong force of 500 people is down to barely thirty.]]
*** In other words, if [[spoiler: Poe had just trusted Holdo and not had Finn and Rose do this (or, conversely, Holdo had kept Poe in line), the plan would have worked and the full Resistance would have been safe.]] If that's not living up the trope, few things do.
*** Holdo herself. If Holdo had discussed the plan with her senior officers, rather than keeping it a secret, not only would she have forestallled the mutiny, she would also have benefited from their input and ensured that, even if something happened to her, other people would be able to execute her plan. By keeping it a secret for no apparent reason, she set a chain of events in motion that quickly spiraled out of control.
*** Earlier on when Luke sense a growing darkness within Kylo Ren, the former actually contemplated on killing him in sleep but even though he realized his mistake, the damage has already been done and it ultimately led Kylo Ren to believed that Luke actually intends to murder him and it ultimately ended up leading him to defect to the Dark Side and kickstarts the plot of the sequel trilogy.
* ''Film/TheCloverfieldParadox'' reveals that [[spoiler:the the first successful firing of the Shepard supercollider to in an attempt to solve the ''Cloverfield Station'' crew's world's energy crisis not only wrecked their own world, but by implication of the titular theory, TheMultiverse, including the worlds of the original ''Film/{{Cloverfield}}'' and ''Film/TenCloverfieldLane''.]]
* ''{{Film/Mythica}}'': Because Marek is a necromancer, every time she touches a part of the Darkspore, it alerts Szorlok to that part's location.
* In ''Film/TheBluesBrothers 2000'', Elwood's well-intentioned attempt to deal with the Russian mob promptly gets Willie's club burned down.
* In the 1963 SwordAndSandal film ''Film/JasonAndTheArgonauts'', Hercules awakens the colossal LivingStatue Talos on the [[IsleOfGiantHorrors Isle of Bronze]] when he steals a javelin-sized brooch-pin from the divine treasure trove he is guarding. Talos chases Hercules and Hylas back to the ship, where Talos destroys it. Jason is able to defeat Talos by [[AttackItsWeakpoint removing a plug from his ankle]], causing the lava-like "blood" to leak out. [[spoiler:Hylas is crushed under Talos when he goes back to retrieve the brooch-pin and he falls down on top of him, and [[ItsAllMyFault Hercules blames himself for the death of his friend]].]]
* In ''Film/TheGuilty'', Asger's attempts to help Iben, a kidnapped woman, end up making things worse:
** He tells Iben to put on her seatbelt and pull the handbrake to incapacitate Michael, her ex-husband and kidnapper, so she can get away from him. It doesn't work, and instead results in Michael putting her in the back of the van.
** He tells Iben to grab a brick and hit Michael over the head when she gets the chance. She does, but since Michael never intended to hurt her, only bring her to the psychiatric ward where she could get the help she needed, it doesn't make anything better. Instead, Michael gets a concussion before he can bring her to the psychiatric ward and Iben herself goes missing.
* In ''Film/TheGravedancers'', the protagonists [[GraveRobbing dig up the physical remains of the ghosts]]--almost getting killed in the process--so they can rebury the bones and lay the ghosts to rest. However, after reburying the bones, the ghosts return, even angrier than before. It is then that Frances reveals that she stole the skulls before the bones were buried so that the ghosts would hang around and she could properly document the existence of the supernatural.
* In ''Film/SonicTheHedgehog2020'', the movie's central conflict happens because Tom shoots Sonic with a tranquilizer dart, accidentally sending all of Sonic's rings to San Francisco. The resulting road trip from Montana to California is because Tom agrees to help Sonic retrieve the rings. On top of this, Tom also handed over one of Sonic's quills to Robotnik since Tom just left it lying around his house instead of hiding it in his pockets.
* ''Film/{{Shrooms}}'': While Jake's reasons for confiscating the group's mobile phones is understandable given the nature of the trips they could have after ingesting the mushrooms, it still isn't exactly a wise idea (arguably). To be fair to him, though, he wasn't to know that the phones would get stolen...
----

* ''WesternAnimation/TheLittleMermaid1'': Ariel's failed DealWithTheDevil allows Ursula to gain access to King Triton's trident, unintentionally dooming her civilization.

* In ''WesternAnimation/KungFuPanda2'', if Po had not [[spoiler: entered [[EvilAlbino Lord Shen]]'s weapon foundry against the advice of Tigress]], then the [[FiveManBand Furious Five's]] plan to [[spoiler: blow up Lord Shen's cannons would have succeeded without a hitch. Instead, they had to get rid of their explosives or Po would be blown up along with [[BigBad Shen]] and the {{Mooks}}. Not only that but Shen managed to shoot Po with his largest cannon, and he would have died if the Soothsayer hadn't found him unconsious in the river.]]

* In ''Disney/BrotherBear'', the central point of the story is that Kenai pursues and kills a bear he blames for his brother's death. Later on, he realizes to his horror [[spoiler:that was Koda's mother]].

* ''Disney/{{Mulan}}''

* ''Disney/WreckItRalph'': The Nicelanders' [[{{Jerkass}} behavior]] towards Ralph makes him leave the game to try to prove that he could be a good guy, which almost [[ApocalypseHow gets their game shut down]].

* Aladdin tricking Jafar into becoming a genie saved the day in ''Disney/{{Aladdin}}''. But when he gets loose in ''Disney/AladdinTheReturnOfJafar'', Aladdin's created a foe with all of the Genie's powers and none of the morals. Although at the same time, some of the threat is gone because genies can't kill, [[RunningGag but you'd be surprised at what you can live through.]]
* In ''Disney/{{Hercules}}'', Hercules frees two boys but unwittingly releases the Hydra. But after trying to defeat it by after cutting head off, three more heads grow in its place. This creates a problem after cutting so many times where there's a swarm of heads.
* ''Disney/TheLittleMermaid'': Ariel's failed DealWithTheDevil allows Ursula to gain access to King Triton's trident, unintentionally dooming her civilization.

* ''Disney/TheLittleMermaidIIReturnToTheSea'': Ariel refusing to tell Melody about her merfolk heritage and her reason of not allowing her to explore the sea is what sets the plot in motion.

* ''Disney/{{Frozen}}'': After Elsa accidentally struck Anna with her powers, their parents kept them apart and isolated her in her room; however, being isolated and fearing her powers is the reason Elsa can't control them.

* Basil and Dawson are in Ratigan's DeathTrap in ''Disney/TheGreatMouseDetective''. The DeathTrap has fortunately been foiled by the broken record. Dawson bellows out his "[[GetAHoldOfYourselfMan Pull Yourself Together!]]", and causes the record needle to jump past the broken spot, thereby starting the DeathTrap up again -- {{ironic}}ally "breaking it" by fixing it. Further {{ironic}}ally, this has been cited as a SugarWiki/MomentOfAwesome for Dawson.
* ''Disney/{{Moana}}'': [[MilesGloriosus Maui]] stealing the heart of Te Fiti results in [[spoiler: her becoming her SuperPoweredEvilSide.]]
* ''Disney/BeautyAndTheBeast'':

* ''Disney/OneHundredAndOneDalmatiansIIPatchsLondonAdventure'': Patch appearing as the lucky dog in the front page headliner photo at the Thunderbolt audition unfortunately ends up biting him, as reading the Ratcliffe's new address on his collar from the photo allows Cruella De Vil to know where Anita and Roger moved to and steal the puppies once again. She even sadistically thanks him when he appears at her warehouse to rescue the other puppies.

** In ''Film/{{Skyfall}}'', M gave Silva to the Chinese to save 6 agents, but in the process caused Silva's StartOfDarkness, leading him to kill dozens of [=MI6=] staff later on. Also, Q's attempt to decrypt Silva's computer by plugging it into MI6's network ends up [[spoiler: releasing a virus that opens every door in [=MI6=]'s new base, allowing Silva to escape.]]

* Film/RockyII: Rocky as the movie progress faces serious finical issues and has to accept the rematch with Apollo despite the concern he could potentially go blind if he suffers serious damage. All of this could have easily been avoided had Rocky not been so irresponsible with his money and blew it all away on things like motorcycles and jackets. Adrian at one point even tried to talk Rocky out of buying expensive jewelry for her so they could save money, but he would not listen nor did he bother to listen to Gonzo's advice about investing the money he made.