->''"Oh, well -- Plan B. Let's just kill each other."''
-->-- '''Castor Troy''', ''Film/FaceOff''

Someone pulled a trigger in an unstable situation. Everyone starts blasting. For this trope to work right, the outcome has to be truly up for grabs. Usually happens in a MexicanStandoff.

One possible result of the PowderKegCrowd. If this happens at the finale of the story, often results in a BolivianArmyEnding.



[[folder:Anime & Manga]]
* The grande finale of ''Manga/RanmaOneHalf'' has Soun Tendo attempting to force Ranma Saotome and Akane Tendo to be married at last, having stolen a cure for Ranma's GenderBender curse that was sent to the dojo as a reward for Ranma's attempts to save Jusenkyo and intending to blackmail Ranma and possibly Akane into going along with the wedding. Ranma promptly tries and steal the cask of Nanniichuan back, his other fiancees show up and start slinging explosives around to prevent the wedding, and his father, Ryoga and Mousse all show up to try and take the Nanniichuan for themselves. How does it end? [[YankTheDogsChain The reception (both the party and the hall) has been blown to hell and back, and Happosai's drunk the Nanniichuan water.]] Nobody gets married, cured, or makes any serious attempt towards sorting out the LoveDodecahedron.
* In one episode of ''Anime/ProjectAKo'', the entire clientele of the alien warship-turned-restaurant turns out to be agents from different special intelligence agencies. This naturally results in a massive free-for-all brawl and shootout.

[[folder: Comic Books]]
* In the ''Franchise/{{Batman}}'' storyline "War Games", the gang war kicked off when Stephanie Brown organised a metting of Gotham's gang bosses in an attempt to unite them under "Matches" Malone. When Matches did not show, the meeting grew increasingly tense. Then one of the bosses made the mistake of reaching into his jacket for his cigar case in a room full of nervous gang boses and their trigger happy bodyguards. A firefight quickly erupted.

* The ending of ''Film/ReservoirDogs''. Mr Orange, Mr White, Nice Guy Eddie and Joe Cabot are pointing guns and yelling at each other and then it's over very quickly.
* ''Film/InglouriousBasterds'':
-->'''Lt. Archie Hicox''': It would appear there's only one thing left for you to do.\\
'''Maj. Dieter Hellstrom''': And what would that be?\\
'''Hicox''': Stiglitz?\\
'''Sgt. Hugo Stiglitz''': Say ''Auf wiedersehen'' to your Nazi balls!
* And again in ''Film/DjangoUnchained''. Tarantino loves this trope.
* The climax of ''Film/CityOnFire'', a 1987 Hong Kong film that influenced ''Film/ReservoirDogs''.
* The ending of ''Film/TheWildBunch''. A literal MexicanStandOff between The Bunch and The Mexican Army ends with everybody (women, children, livestock, etc.) getting killed in a hail of bullets, [[MoreDakka complete with a heavy machine gun blazing]].
* The end of the Will Smith movie ''Film/EnemyOfTheState'', in which Will Smith hides under a table during a MexicanStandOff. It devolves into a BlastOut between the Mafia and the evil government agents, and nearly everybody dies.
* The movie ''Film/{{Desperado}}'', where the main character gets into a BlastOut with an entire bar full of Mexican gangsters and somehow manages to survive. We never even ''see'' how he manages to survive a shoot-out with an entire casa full of goons!
* ''Film/PiratesOfTheCaribbeanAtWorldsEnd'', Jack pulls the trigger during a MexicanStandoff, but it [[SubvertedTrope turns out the powder in all their guns is wet, so none of them go off]].
* ''Film/TrueRomance'' a bloody shootout occurs between TheMafia, the LAPD and two HiredGuns and the protagonists, all in the same room.
* The movie ''Film/{{Tombstone}}'' portrays the Gunfight at the O.K. Corral as a [[MexicanStandoff tense standoff]] before a sly wink from Doc Holiday to Billy Clanton turns it into a full blown BlastOut.
* In the film version of ''Film/ChildrenOfMen'', [[spoiler:the battle between the military and the rebels is cut short when the hero comes through, holding the first baby in nearly two decades, as everyone looks on in awe, not wanting to harm it and quite possibly starting to cool down in general. Not long after he's cleared the battlefield, though, someone fires their gun and the whole thing starts again. Then the carpet bombing starts, more or less rendering the exercise moot anyway.]]
* The Til Schweiger movie Eisbär (Ice Bear) from 1998 has many references to Pulp Fiction, but it ends in a Mexican stand-off (only with Europeans). It culminates in a very impressively staged BlastOut.
* ''Film/BattleRoyale'' has this as one of the most memorable scenes in the film: A group of about 10 schoolgirls are sitting around a table, in a refuge from the senseless slaughter around them. Then someone gets poisoned. Someone else gets paranoid, picks up a gun, and starts shooting. Everyone else follows suit. Survivors: 0. Time elapsed from happy to everyone being dead: 2 minutes, 17 seconds.
* In ''Film/LockStockAndTwoSmokingBarrels'', the gangs of Rory Breaker and Dog stumble upon each other with guns drawn, both expecting to find someone else. They start shooting anyway.
* Parodied in ''Facepunch!'', a fictional movie in the film adaptation of ''[[Literature/{{Twilight}} New Moon]]''. The only audio we hear consists of a standoff quickly falling apart. LET'S DO THIS!
* Double subverted in ''Film/SavingPrivateRyan'', during one scene an American soldier accidentally knocks down a wall by leaning on a log, only to reveal a squad of Germans on the other side, both the Americans and Germans scream and point weapons at each other, and right when the viewer thinks both sides will start firing...[[spoiler:''another'' American squad of soldiers, who are off screen, open fire and kill the Germans.]]
* In Peter Jackson's adaptation of ''Film/TheTwoTowers'', Saruman's forces reach Helm's Deep and there is a tense moment while the Uruk-hai pound their spears on the ground in unison. and the defenders of Rohan prepare to loose their arrows. Suddenly, one of the archers, an old man, loses his grip on his bowstring and lands an arrow in an Uruk-hai neck. After a moment of stunned silence, the battle begins, though contrary to this trope's usual context, there's no way in hell that legion of Uruk-hai would have allowed a peaceful solution.
* In ''Film/{{Basic}}'', two Army prisoners are held after their squad is apparently wiped out, along with their [[FamedInStory prestigious]] and [[DrillSergeantNasty famously cruel]] commander. Each tries to spin the story to their own individual advantage, which results in us seeing [[RashomonStyle multiple different versions of a blast out]].
* Done on an organisation-wide basis in ''Film/CaptainAmericaTheWinterSoldier''. [[spoiler:Steve Rogers broadcasts that S.H.I.E.L.D. has been infiltrated by HYDRA, causing the loyalists and the infiltrators to point guns at each other, including Agent 13 and Brock Rumlow. Brock drops his pistol in apparent surrender, then uses a knife to slash 13's gun-arm. Everyone then starts shooting at each other.]]
* In ''Film/TheBrassTeapot'' [[spoiler:Arnie and his wife, and the two Hasidic brothers]] pull guns on each other over possession of the titular Teapot near the movieís climax. Itís not long before one of them shoots and they all kill each other.
* Most of the running time of Creator/BenWheatley's ''Film/{{Free Fire|2017}}'' is taken up by an apocalyptic ''twelve-way'' blast-out, with bloodied characters stumbling from one piece of cover to the next, making and breaking alliances at breakneck speed.
* ''Film/TheTallBlondManWithOneBlackShoe'': Francois' pal Maurice, a practical joker, hands out a couple of [[ExplodingCigar exploding cigars]] -- one of which, late in the picture, goes off in an ashtray during a tense MexicanStandoff between four men, all of whom promptly shoot each other.
* ''Film/WindRiver'': The situation between the deputies and the [[spoiler: security guards]] at the drill site is extremely tense, and one MexicanStandoff has already been talked down. Then someone thinks he can get the drop on Jane by firing when she is not expecting it. A massive firefight ensues, with Jane ironically being of the few survivors.
* At the start of ''Film/DenOfThieves'', Merriman and his crew are holding the armoured car guards at gunpoint while they hijack the armoured car. Things are going according to plan till one of the guards goes for his gun (or possibly just drops his coffee). Bosco shoots, a firefight kicks off that leaves one robber, most of the guards and several cops dead, and several others injured.

* Creator/DavidWeber's ''Literature/HellsGate'' series includes this. Two populations have been exploring the multiverse for decades without encountering anyone, so neither side is prepared when they both enter the same universe at the same time. Two scouts meet in the forest, we see the situation from both their perspectives - they're justifiably tense - and then the story cuts away so not even the reader knows what happens. Both end up dead, and a series of mistakes, bad decisions, and lack of communication sends things FromBadToWorse.

[[folder:Live Action TV]]
* [[InvokedTrope Invoked]] in an episode of ''Series/BurnNotice'', when the VillainOfTheWeek is tricked by Michael and his friends into thinking that one of his henchmen is a traitor. This later results in a MexicanStandoff/argument between the villain, the "traitor", and some {{Mook}} who has no idea what the hell is going on. Sam, who is outside posing as a corrupt cop (long story), then fires his gun into the ground and then we hear a few off-screen shots, the villain begging for his life, and then [[CoupDeGrace one final shot.]] Michael even lampshades this when he says that arguments with guns drawn are not a good idea since everyone is tense and ''anything'' could set it off.
* Double subverted on ''Series/{{Justified}}'' when US Marshal Raylan Givens is in a tense standoff with two armed criminals. Raylan is able to calm them down and convince them that surrender is their best option. However, both thugs then realize that only one of the will be able to get a immunity in exchange for testify against their bosses. They start arguing and then turn their guns on each other. Before Raylan can talk them down again, they open fire and [[MutualKill kill each other]].
** The show consistently subverts this trope when smart characters like Raylan, Boyd or Limehouse are involved. They will avoid a blast out by talking the opposition down or even suggesting a mutually beneficial deal. When a Detroit mobster called Picker is introduced in season 4, he is established as the OnlySaneMan among Nicky Augustino's crew when he walks away from a MexicanStandoff with Raylan and Constable Bob for the simple reason that there was nothing to be gained from shooting it out.
* On ''Series/{{The 100}}'', the peace talks between the 100 and the Grounders were tense to begin with, but when Jasper (who'd been hiding in the nearby woods with a gun) spots a Grounder hiding in the nearby woods with a bow and arrow, he opens fire, and everything goes right straight to hell.
* ''Series/{{CSI}}'': "Better Off Dead" opens with a furious firefight in a gun store that results in multiple fatalities. Flashbacks later show that is was triggered by a Blast Out, and the man responsible walked away without a scratch despite standing at the centre of the hail of bullets.

* Possible OlderThanPrint ur-example: The Battle of Camlann in [[Myth/KingArthur Arthurian legend]] is said to have begun when, at a tense parley, a soldier drew his sword to kill a snake.

[[folder:Video Games]]
* Season 2, Episode 4 of ''VideoGame/TheWalkingDead'' ends with [[spoiler:either Clementine or Kenny shooting Rebecca, who had began to turn into a walker, which triggers the group of Russian survivors to start blasting away with assault rifles. Cue SmashToBlack.]]
* One MexicanStandoff between four Mah Jhong players in ''VideoGame/{{Killer 7}}'' winds up with all four men pulling the triggers simultaneously and all dying at once.
* How [[spoiler: John Marston]] meets his end in ''VideoGame/RedDeadRedemption''.
** This trope determines who has the starting advantage during some of the multiplayer game types while the players who were killed during it have to wait until they respawn.
* In one Allied mission in ''VideoGame/SilentStorm'', your team arrives to investigate a group of Allied soldiers suspected of being Nazi spies. However, they all think ''you'' are the spies. Everyone is cramped in a small room with guns loaded (and submachineguns are deadly at close range). This is a turn-based game, though, and you get the first turn. Otherwise, the game may have been over then.
* An early level of ''VideoGame/PerfectDark Zero'' has the player coming up on a room full of enemies, split between the henchmen of a local crime boss and dataDyne's personal army. They're all very twitchy and constantly bickering between each other, however, so it doesn't take much - just shoot one without letting the rest see you, for instance - to set them against each other.
* This happens during "The Wrap-Up" in ''VideoGame/GrandTheftAutoV''- an ''utterly insane'' MexicanStandoff, consisting of [[InterServiceRivalry multiple government factions]], a PrivateMilitaryContractor and a [[SpannerInTheWorks couple of criminals]] has an FIB agent with an itchy-trigger finger shoot another FIB agent in the leg; that agent then shoots another in the head and things go to hell.
* Deliberately invoked by Gene(aka Viper) in VideoGame/MetalGearSolidPortableOps. Using his MoreThanMindControl, he plants feelings of paranoia amongst a large platoon of defectors, creating a PowderKegCrowd, until inevitably one pulls the trigger on their rifle, causing the entire group to start gunning each other down to a man. Only Big Boss and Johnathan where unaffected.

[[folder:Web Original]]
* One of the best examples of this in ''Roleplay/SurvivalOfTheFittest'' is the MexicanStandoff between David Jackson, Jacob Starr, and Peri Barclay. To cut a long story short, Jacob snaps and starts shooting and a large fight ensues. Remarkably, very few people were injured.

[[folder:Western Animation]]
* Parodied in the Huck Finn episode of ''WesternAnimation/TheSimpsons'', a saloon undergoes a blast out when everyone pulls derringers out from a variety of hiding places, including from ''within the barrel of a larger gun'', and starts firng wildly... and [[LittleUselessGun they are revealed to be unable to even damage glass.]] "These derringers sure are weak, Tom." "Powerful weak." One bounces off someone's eyeball, not even causing them to blink.

[[folder:Real Life]]
* The Battle of Lexington, where the question of "who fired the first shot" is a historical mystery. Whoever did fire the first shot, the "Shot Heard 'Round the World", it marked the beginning of what would become the American Revolutionary War.