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Plot-Driven Breakdown
The Doctor: Clicking towards oblivion. How long K-9?
K-9: Insufficient data.
The Doctor: Yeah, you never fucking know the answer when it's important.

Sometimes things just break down purely for plot development.

It seems that even the most prepared of heroes can have their sword shatter, axle break, fuel run out, energy pack go flat or engine overheat, regardless of how well they prepared for the journey or the top-grade equipment they bought. Or a bridge or section of the cave roof will collapse at a convenient time with no apparent reason. When this inexplicable breakdown causes plot development, the item can be said to have suffered a Plot-Driven Breakdown.

Plot Driven Breakdowns occur when a breakdown:
  • occurs at a crucial time
  • occurs for no discernable (in-universe) reason
  • causes plot development (e.g. so that two antagonistic characters end up stranded together for a whole episode, or the hero has to find another, more creative way to defeat an enemy)

Often the equipment in question is something the hero depends on (e.g. a Plot Coupon, spiritual enhancement, The Professor's invention). Having the equipment fail is therefore an obvious way of developing the plot, forcing the hero to Take a Third Option, reassess his chances or get more creative. It's a way of avoiding the predictable "Hero defeats enemy with his favourite weapon" conflict resolution. However, when the writers fail to provide reasonable justification for the failure, the audience's Willing Suspension of Disbelief is broken.

This trope also implies the inverse notion; vital equipment will not fail or break unless it would complicate the plot.

See also Tempting Fate ("____ will save us!" Turns out it won't...). See My Car Hates Me for when this trope is applied to cars or Cellphones Are Useless for cell phone examples.

The video game equivalent is called the Broken Bridge.


Examples:

    open/close all folders 

    Anime and Manga 
  • In Bleach, Ichigo's Hollow Mask is said to stay on for 11 seconds (give or take how temperamental the mask is), but tends to run out just before he can finish off his opponent in the battles he loses. In the battles he wins, it stays on indefinitely after the battle is over.
  • In mecha anime Gundam Wing, Trowa's BFG arsenal on his Gundam tended to run out of ammunition at some point in a major engagement.
    • Which is probably one of the more reasonable examples, considering his battle tactics are pretty much "stand in one spot and shoot everything".
    • It's actually VERY reasonable once you realize that in about a year of nearly non-stop fighting, he only runs out of bullets about 3 times (including the movie), and each time usually after a period of intense fighting.
  • In Mobile Suit Gundam MSIGLOO, with its unusual focus on realism, this happens several times to giant war machines. Even more justified as the machines in question are usually experimental prototypes undergoing testing, so it makes some sense that they would have some flaws. In Episode 2, a destroyed Zaku's arm gets lodged in the Hidolfr's tracks, immobilizing it. In Episode 5, a Ball suffers a weapon malfunction at a critical moment, leading to the pilot getting taken prisoner rather than winning the battle.
  • Inversion: In Naruto, when Naruto is fighting Gaara he tries to summon toads early on in battle, he gets Gamakichi and Gamatatsu (who are small, although better than the tadpoles he was summoning earlier) while trying to get Gamabunta (who's a 100 meters tall), but succeeds in summoning Gamabunta once it becomes absolutely necessary (despite the last time requiring him to use his Superpowered Evil Side).
  • This is usually the reason that Teen Genius Susumu's experiments fail on Wandaba Style. The very first and the third are for the "no discernible reason" variety, but the others are generally due to outside interference (a fight between his pilots damages the ship, a character falls from A Twinkle in the Sky onto the electric grid, etc.). The last part of the episode is spent trying to find a way to fix the problem and not die in the process.
  • In Tengen Toppa Gurren Lagann, Simon is unable to pilot Gurren Lagann properly in episode 9, dealing with the huge impact of His blood brother Kamina's tragic demise. His mech is powered by Spiral Energy, which is generated through determination- but Simon is a complete wreck, causing him to get so upset in battle he loses control of Gurren Lagann to the point he pukes. Which generates Spiral Energy out of Lagann's mouth in way similar to puke. This worsens to the point Lagann by itself refuses to listen to him. Until Simon overcomes his grief in a blockbuster manner several episodes later and returns with a vengeance.

    Comic Books 
  • Possibly the Trope Maker is Spiderman's Web Shooters, which can be guaranteed to run out of fluid whenever it's vitally needed to catch the villain (or run away, depending on the situation), forcing Spidey either improvise or (as was the case with the Green Goblin a lot) let the bad guy get away. Even when he finally wised up and started keeping spare fluid packs in his suit, that didn't stop the fluid from running out (and having to be changed) at the worst possible time. It's lampshaded. A lot.
    • As a side note, the recent movies and the several alternate continuities avert this by having the webbing be organic...except in the second movie, where a crisis of confidence shorts out his powers.
  • In the case of Empowered's super suit, it is easier to list the times when the Hypermembrane does work correctly. A justified example. Emp has a theory that the suit's reliability is tied into her self-confidence. The times the suit works are usually when she's pissed off or determined.
  • In the original (pre-movie) version of The Rocketeer, Hughes asks Peevy if anyone has thought of checking the fuel level on the rocket pack. Minutes later, Cliff runs out of fuel in mid-flight. There is exactly enough time for Hughes to get into a plane, catch up with him and grab him before he hits the ground.

    Film 
  • In the 2007 Teenage Mutant Ninja Turtles film, Leonardo suffers one of these in his rooftop fight with Raphael. Being the Turtle with the most technical skill, one would think he'd know better than to leave his katana locked in Raphael's sai - a weapon designed to trap and break swords. And upon the inevitable break, one would expect him to have a better reaction than to stare numbly at the snapped-off handles until Raph kicks him to the ground. This is probably because the key problem of the film (unity among the Turtles) would have been made worse if Leonardo had won the fight. Raphael is not the sort to be humbled by defeat and may have estranged himself.
  • This happens all the time to any source of light in Darkness Falls.
  • In the How to Train Your Dragon movie, Toothless' prosthetic tail fin is burnt off by a fireball he and Hiccup are flying away from near the film's end, setting up the crash landing and Disney Death.
  • Jordy shooting a cherry bomb at Jason's bike in Mystery Team.
  • Top Gun: During the climactic dogfight, the aircraft carrier's catapult breaks down without warning, preventing the launch of any more planes to assist the heroes, and forcing Maverick to overcome his traumatic fears.
    • Made especially bad by fact that they have redundant systems in reality for exactly this reason.
  • In Star Trek: The Motion Picture, the transporter malfunction that kills Science Officer Sonak is not foreshadowed in any way. It was initially though that Leonard Nimoy would not be reprising his role as Spock, but when he agreed to return, Sonak had to be removed.
    • It's not quite true that the malfunction wasn't foreshadowed at all; there had been at least two scenes prior to it in which characters had pointed out that the Enterprise had just undergone a major refit and wasn't ready for launch. (Plus, Nimoy had already agreed to return before they even started filming, so there was no need to "remove" a character who hadn't even existed on-screen yet; they could just as easily have killed off a random redshirt, or dropped both Sonak and the transporter scene entirely.)
  • Subverted in Double Indemnity, when Walter and Phyllis are unable to start their getaway car the first few times they turn the key. But then the engine turns over, they get away, and the temporary malfunction never affects the plot.
  • In The Empire Strikes Back, the Millennium Falcon's HYPER Drive systems refuse to work for nearly the whole film which means they can't easily escape the Imperial Fleet like everyone else, leading to their eventual capture, which requires Luke to divert from his training early to save them leading to his defeat by Vader and Han's capture by Fett. Basically if it had worked there wouldn't be any danger in the film at all past the quarter point.
  • In It Happened One Night, the hero's car breaks down, just as he was to reach his Love Interest and resolve their Third Act Misunderstanding.

    Literature 
  • Arthur's swordnote  when he fought Pellinor.
  • The Maghook grappling guns, from Matthew Reilly's books. After being reliable in the first couple of books, in Scarecrow, The Big Guy (so to speak) finally comes across a situation where the Maghook happens to be out of propellant, and thinks "Come on! That never happens with The Hero." And then in the next paragraph, The Hero has his Maghook run out of propellant.

    Live Action TV 
  • In the reimagined Battlestar Galactica episode Act of Contrition, a recon drone kills 13 pilots when its restraints come off seemingly on their own. It's some tragic Truth in Television, as this exact same incident had happened in reality with missiles being shuffled to their aircraft on aircraft carriers falling to the deck and going kablooie. A character in the episode even says "I know it's hard to hear, but we were lucky. If that had been a missile..."
    • Said equipment used to store the drone was also 40+ years old.
    • It seems the network asked Moore to add some joy and happiness to the show. The pilots certainly are happy. Just as they blow up. Then, the network stoped asking for things.
  • Red Dwarf uses this trope regularly and unashamedly, seeing as the show relies more on character interaction than plot development.
  • In Smallville, if Clark is being snuck up on and is about to be attacked in such a way as to expose his invulnerability to a regular character that doesn't know his secret, you can count on a coincidental chunk of Kryptonite popping up to make him vulnerable, or he didn't have his powers anyway. This could be more easily averted if the writers understood how Clark's super-hearing actually works and had him playing possum to protect his secret.
  • Who can forget the Transporter from Star Trek? Whenever they need to make a hasty retreat or get stuff to the surface immediately, there's always "too much atmospheric interference".
    • It gets worse: Remember the Enterprise's "transporter malfunction" in Star Trek: The Motion Picture? They even used it as a way to conveniently "remove" the new Vulcan science officer who was supposed to replace Spock. Granted, everyone was naturally wanting to see Spock on the bridge again, and any other Vulcan would most likely have been unacceptable. But come on! Couldn't they have just reassigned the poor guy?
    • Voyager was particularly bad at this, one episode (workforce part 2) had transporters and warp drive fail within minutes of each other, despite the sheer size of each system a single weapon hit is all that is required to take them offline.
    • Sometimes, Star Trek couldn't think up a reason for the transporter to not be working, or at least for the crew to not come down in a shuttlecraft. So half the time, it wasn't just that the transporters were down; the communicators wouldn't work either, or had been stolen.
  • The Stargate breaking down was, of course, the basis for some of the most memorable episodes of Stargate SG-1 and Stargate Atlantis.
  • DeMilo's whorehouse-on-wheels breaks down just as the heroes get to their destination in Tin Man.
  • This trope occurs in the pilot episode for Porridge, after Fletcher pees into the petroltank of a prison van.
    • Not really an example, as he caused the breakdown deliberately.
  • Axl's car breakdown in The Middle's "Vacation Days" sets him for a climactic chat with his mother on the way home. Justified by Axl not being the kind of person who would be expected to regularly maintain his car, as his father points out.

    Tabletop Games 
  • In The Marvel Universe Roleplaying Game, it suggests not keeping track of ammunition. Instead it suggests using this trope. So instead of saying "Well, Spidey you have five shots of web fluid left." you let it run out like when the villain is supposed to escape, or whatever.
  • Big Eyes, Small Mouth has a similar system with the optional "Dramatic Ammunition Rules". This is coupled with an ability called One Bullet Left, that gives you one last shot when the GM declares you're out of ammo.
  • Similary the FATE role-playing system. Almost any sort of breakdown, including guns running out of ammunition, only happens when it's dramatically useful. On the other hand, the Fate Point economy means that the PLAYER may frequently suggest such breakdowns to the GM in order to get Hero Points to spend elsewhere.
    • There's also a specific stunt, One Shot Left that lets the player declare their gun is out of ammo in return for a bonus that guarantees the last shot will be plot-appropriately spectacular.

    Video Games 
  • In Gears of War you can expect to be unable to access the Hammer of Dawn whenever a boss fight breaks out.
    • Except when you need the Hammer of Dawn to hurt it. Then there will be like six of them scattered around (despite the fact that you can't carry a second one, it never runs out of ammo in Campaign, and you can only play Co-Op with one other person).
  • In Phoenix Wright: Ace Attorney: Trials and Tribulations, Phoenix bravely and perhaps stupidly attempts to cross a burning bridge to save Maya, only to have it collapse when he is half way across. He is sent plunging into an incredibly deadly river only to survive with little more than a head cold. But this accident ultimately leads to a major break in the case.
  • This is the plot behind most of the Survival levels in Left 4 Dead - they present hypothetical "What if?" situations for the crescendo events throughout the game, in which an event that must be triggered to clear/complete the path during the campaign doesn't go quite as expected (for example, in one map there is a bridge that must be lowered and crossed in the campaign, but it jams and fails to lower at all in the Survival version), leaving the survivors to simply fight until they're all dead.
  • Guess what happens if you try to ignore plot-heavy Cosmo Canyon in Final Fantasy VII? Yep, your buggy breaks down.
  • In the second half of one of the last Los Santos missions in Grand Theft Auto: San Andreas, you're given an old, poorly-maintained AK-47 to defend the car you're escaping in. About halfway through that sequence (right as the police manage to set up an effective road block) it irreparably jams.
  • This trope seems to happen in every Metroid game. Samus' powerups always malfunction or disappear somewhere whenever she needs them.
    • Typically, this happens offscreen between games. However, the first two Metroid Prime games start you off with some items but have you lose them early on, to a reactor explosion and some thieving Ing, respectively. Other M instead has you in possession of all your items but unable to use them for plot-related reasons—not a malfunction, strictly speaking, but it serves the same purpose.

    Web Comics 

    Western Animation 
  • Captain N. It doesn't matter if he just left the palace and walked through the main gates, or if he's traveled to fourteen different worlds and then fought through 7 stages of deadly, monster-infested secret passages, his zapper/pad WILL run out of power the moment he has to fight Mother Brain.
    • Actually that didn't happen that much, but it was an easy out for the writers to force the heroes to retreat and fight another day.
  • Inspector Gadget is a walking example of this trope. He might define it better than Spider-Man does. Most of his Gadgets don't work well anyway. Although sometimes using the wrong gadget saves the day.
  • There's at least one scene (and probably two or more) in the Ruby-Spears production of the American Mega Man cartoon, where Mega Man runs low on power in a critical situation.
  • This trope is the reason Scooby and the gang ever got anything done.
    • The Mystery Machine is prone to this, it's usually the reason the gang is stuck having to solve a mystery in some out of the way locations.
    • In one episode of Mystery Inc, they get stuck because someone stole the Mystery Machine's engine while they weren't looking.
  • Ben Tennyson's Omnitrix never works right. Even when it's upgraded.
    • Although it's implied that the Omnitrix/Ultimatrix is semi-sentient, and gives Ben unexpected transformations as a way of saying "Here, exercise your strategy instead of using the obvious solution". Though all too often it ends up giving him a transformation that ends up putting him in extra danger, instead, like giving him Rath when he's facing an opponent who can mind control cats, or during the Khyber story arc when the Omnitrix refused to transform into anything other than things that Khyber's hound could actively counter.
  • The Legend of Korra has two characters need to deliver a warning before the villains can attack. Since this is the age of radio technology, this would be simple except the airship they hijack has had the radio ripped out, the town they fly it to doesn't have a strong enough transmitter, and no one on the other end picks up when they do get a radio strong enough.

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