The heroes entered the classical old pub. A particularly nasty guy taunts one of the characters and tries to hit him. The hero dodge and the other guy hits a bigger, nastier guy who proceed to toss him against a table, causing the people sat at that table to react, and soon enough three quarters of the customers are tangled in a chaotic battle, throwing chairs and tables and resorting to dirty fights. You get the picture.

This trope tends to be quite common and is often paired with BarBrawl with some exceptions. The focus point is that it starts as a duel and ends up growing and dragging along other characters, like an avalanche. In westerns this tends to be quite common. Especially funny if the participants just start fighting each other for the hell of it, even if they have no grudges against each other. [[VitriolicBestBuds Sometimes even if they are friends!]]

See also BarBrawl, FoodFight, DinerBrawl and EveryoneJoinTheParty. Don't confuse with EscalatingWar.



[[folder:Anime & Manga]]
* In ''Manga/FairyTail'', the first time we see the titular guild, Natsu causes one of these. Luckily, Makarov stops the brawl before anyone resorts to magic.

[[folder:Comic Books]]
* Happens several times in ''ComicBook/TexWiller'', including an epic brawl that ended when the resident BoisterousBruiser Gros Jean kicked all the bad guys out of the inn and then chopped the supporting pillars with an axe, wrecking the whole place.

[[folder:Fan Works]]
* In ''Fanfic/DragonBallInsanitySchool'' at the end of the World Tournament Vegeta, angry against Trunks hits him, prompting Pan to come to his help and getting hit, prompting Gohan to join the battle, prompting Trunks to protect his father, prompting Goten to defend his brother, [[OverlyLongGag prompting Vegeta to protect his son]] and finally pushing [[PapaWolf Goku to help his sons.]]

[[folder:Films -- Live-Action]]
* ''Film/TheGreatRace''
** In the town of Borracho, a fight between The Great Leslie and Texas Jack quickly turns into an all-out BarBrawl.
** The pie fight scene in develops this way; people walk in to the bakery, see what's going on, get hit by a missile intended for someone else and join the scrum--except, of course, for The Great Leslie, who walks through the crossfire unscathed until someone gets him in the face at close quarters. Obviously, this is PlayedForLaughs.
* ''BlazingSaddles'' has a famous one that [[NoFourthWall (literally) crashes through the (in-universe) Fourth Wall]], starting out as a street battle pitting the townspeople against the {{Mooks}} hired by a crooked railroad tycoon to terrorize Rock Ridge. The combatants eventually brawl their way onto a movie soundstage, where one of them punches the director in the gut and all the castmembers join the fight in retaliation. ''Then'' the fight spills over into the studio commissary (packed with extras dressed in various ridiculous costumes, of course), and ''everyone'' begins [[PieInTheFace throwing pies at each other]].

[[folder:Live-Action TV]]
* One of the several openings of ''Series/{{Soap}}'' shows a brawl that starts with Burt trying to get in front of Chester for the family photo, but ends up involving all except the Major (who is too out of it to notice) and Billy (who considers himself the OnlySaneMan in his family, and sits watching amused by it all) and Benson, the resident ServileSnarker just leans against a wall with a bored look on his face.
* PlayedForLaughs in ''Series/TheYoungOnes'' episode "Sick", where a misunderstanding between two men outside the Young Ones' house escalates into a full-blown street riot that even manages to draw in the episode's guest band Madness.

* The parody song "Alla Fiera Thunder Bluff" (based on ''VideoGame/WorldOfWarcraft''), a gnome wizard tries to buy a trinket in Thunder Bluff but is mugged by a Tauren. The following, escalating conflict ends up in a titanic brawl and eventually a Blizzard GM appears, scolds the gnome for causing the mess and then gets fired.

* Happens near the end of the second act of Creator/RichardWagner's ''Die Meistersinger''.
* The opening scene of ''Theatre/RomeoAndJuliet'' has a servant of the Capulets taunt a servant of the Montagues with an obscene hand gesture on a street in Verona. This is enough to trigger a gigantic brawl between everyone in both families that soon spreads all over town, until Prince Escalus threatens to have anyone who fights from that point forward executed.

[[folder:Web Comics]]
* In ''Webcomic/TheOrderOfTheStick'', the argument between Roy, Gannji and Enor ends up in a gigantic pub brawl.

[[folder:Web Original]]
* ''Any'' FlameWar almost by definition, especially once it reaches InternetBackdraft levels. True, a FlameWar can stay contained between two combatants, but it rarely, if ever, ''does'' and almost always instead drags in anyone who sees it -- which is why they tend to be so destructive to anywhere they start.

[[folder:Western Animation]]
* Subverted in ''WesternAnimation/AvatarTheLastAirbender'', where Hakoda tries to invoke a prison riot by shoving the stereotypical huge tattooed guy... who responds with words because he's working on controlling his anger. And then double subverted by Chit Sang, who picks up a prisoner [[GrievousHarmWithABody and throws him at another prisoner]]. Yup, that'll do it. (Granted, it's hard to ''escalate'' from that point, but it spreads.)
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'': Season 2, Episode 3: "Lesson Zero": Twilight puts a "Want It, Need It" spell on a ratty old toy of hers named Miss Smartypants to get the [[spoiler:Cutie Mark Crusaders to fight over it. But because Twilight's in the middle of a freak out, the spell is so strong that anypony who sees the toy wants it and gets into the fight. By the end of the episode, there's a BigBallOfViolence involving everyone in Ponyville except the core cast]].
* In the ''WesternAnimation/RegularShow'' episode "Karaoke Video", Mordecai and Rigby's fight over an embarrassing video tape with a karaoke bar's owners escalate into a huge brawl involving all of the bar's guests.
* ''TheSimpsons'' can't get enough of this trope. The people of Springfield just can't help getting into fights over ''everything'', usually starting with one character becoming so offended by what another character said that he punches him in the face; somehow, this encourages every single person on the street to start brawling with whichever person is closest to them at the time (which backfired horribly on Moe the Bartender once when the person next to him turned out to be a heavyweight champion boxer).

[[folder:Real Life]]
* Many urban riots and similar outbreaks of civil unrest begin this way, with members of one social group bullying around members of another social group. Word begins to spread, and before long there's [[CycleOfRevenge escalating retaliation on everyone's part]].
* The Boston Massacre apparently began this way, with a boy hurling snowballs at a British soldier and getting shoved over for his trouble. Then more colonial protesters started to show up...