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You're just minding your own business when there is suddenly a commotion aroused nearby. A SavageWolf suddenly appears snarling and chasing everyone in town. No matter what happens, you can't seem to subdue the wolf. Suddenly, as the wolf turns around, you look and see that there is a thorn stuck in the wolf's left hind paw so you quickly trap the wolf with a net. Once the wolf has been subdued, you pull the thorn out from the wolf's foot. The wolf gets back up again, but this time, he starts licking your face and wagging his tail, happy that the thorn is removed.

This is when a creature of some sort wreaks havoc in a nearby community, due to the fact that there is a sharp object stuck on a part of its body. Once you remove the sharp object, the creature is no longer angry. Sometimes, the animal might just run back into the forest without a display of gratitude or affection for whoever stopped the pain.

Not to be confused with: ForWantOfANail. Or IBrokeANail. Compare: AndroclesLion.


[[folder:Anime and Manga]]
* This happened ''[[FleetingDemographicRule four times]]'' in ''Anime/{{Pokemon}}'':
** The Kanto episode "To Master The Onixpected" had Elite Four member Bruno capture an Onix after pulling out a Sandslash that had been lodged between two segments of its rock body.
** The Sinnoh episode "Faced With Steelix Determination" involved a Steelix going on a mad rage near a village of Bidoof because of some shovels that Team Rocket had accidentally jabbed into its head. [[FromBadToWorse Made even worse]] when it was nearing a large lake during its anger (Steelix are Steel and Ground Pokemon and are weak against water). Fortunately, Ash and the gang, with help from the Bidoof, were able to remove the shovels before Steelix could fall into the lake.
** Later Professor Oak proved his identity by identifying that a Tyranitar had a splinter in its foot. The Tyranitar didn't go on a rampage but its trainer said it had been acting grumpy lately.
** A ''Best Wishes'' episode had a wild Gigalith that was terrorizing town while Ash was battling against Unova Champion Alder. Alder then noticed that Gigalith had a nail stuck in its foot so he removed it.
* The boar at the beginning of ''Anime/PrincessMononoke'' was crazy/evil because of a bullet (or rather the ensuing infection).
* In the ''Anime/FreshPrettyCure'' movie, Inori/Cure Pine gets stuck in a prehistoric jungle and got chased off by an angry TyrannosaurusRex. But then, Pine found out that it's just in a rampage because a glass or sorts got stuck in its leg, so being the KindlyVet, Pine removed that glass thing to calm it down.
* This is essentially the effect of "black gears" in ''Anime/DigimonAdventure'' and dark rings and dark spirals in ''Anime/DigimonAdventure02''.
* A supernatural variant occurs in ''Anime/SpiritedAway''. The bathhouse is besieged by a rather grouchy stink spirit; while it's in the bath, Chihiro notices that it has a thorn in its side [[spoiler: actually the handlebar from a bicycle, which leads to ''a lot'' of miscellaneous junk stuck in its body, the result of people throwing unwanted objects into the river]]. When she pulls the thorn [[spoiler: and everything else along with it]] out, the stink spirit transforms into a much more benign river spirit.

[[folder:Comic Books]]
* This wasn't an actual nail, but there was a {{Superman}}/[[ComicBook/IncredibleHulk Hulk]] crossover story where Hulk is on a rampage and Superman discovers a tiny little machine is emitting a sound that is driving Hulk crazy. Superman destroys it and soon after Hulk begins to calm down.

[[folder:Fairy Tales]]
* The folk tale ''The Lion and the Mouse''. Mostly likely the UrExample of this trope.

* ''WesternAnimation/KirikouAndTheSorceress'': The sorceress has a massive thorn in her back, stuck so deeply in the only way to remove it is with your teeth. When it's removed, she gets better.
* Inversion: In ''Film/HouseOfFrankenstein'', removing the stake from the heart area of Dracula's skeleton lets him instantly re-form and go on a "rampage" of bloodsucking.
* The film ''Namu, The Killer Whale'' had one of these--Namu was provoked into a rage by someone throwing him a fish rigged with a hook. He finally calmed when someone found the hook and pulled it out.
* In ''Film/SnowDogs'', the malamute Demon seems to have a permanently vicious temperament. Near the end of the film, we learn that it's all due to a bad tooth. Ted (a dentist) pulls out the tooth, and Demon gratefully licks his face.
* In the film ''Film/JungleBoy,'' main character Suresh figures out that a horse is rearing because of something stuck in its hoof.

* ''Literature/RiftwarCycle'': A bear went on a rampage because it had an arrowhead stuck in it. The arrowhead was shown be made oddly or wrong, and its maker--also assumed to be the one who shot it, ended up wanted for murder--specifically of those the bear had killed in its rampage.
* In ''Literature/TheSilmarillion'', Carcharoth was already evil and violent to begin with when he ate the hand of Beren, which caused him to go on a mindless rampage - probably because the hand in question was holding a silmaril at the time, meaning that Carcharoth's guts were engulfed in constant burning agony. Possibly one of the most extreme examples of this trope--both in terms of deadliness of rampage and the pain.

[[folder:Role-Playing Games]]
* In ''Roleplay/DinoAttackRPG'', Rex's only tamed Mutant T-Rex, Maw, suddenly went on a maddened rampage and, in the process, nearly killed Dino Attack Team's founding members. When Rex was finally able to calm Maw down, he discovered that the T-Rex had been stabbed in the foot by Sam Sinister.

[[folder:Tabletop Games]]
* In ''TabletopGame/Warhammer40000'', Angron became a gladiator slave and was implanted with so-called "Butcher's nails" which amplified his aggression. He also gave downgraded versions of these nails to his Space Marine Legion.

[[folder:Video Games]]
* ''VideoGame/MassEffect1'': The rachni are wreaking havoc on the research station on Noveria. It turns out this is because they are separated from their mother, causing them to become mindless and violent. The original Rachni Wars were also a result of this: [[spoiler:the rachni are normally a peaceful species, but the Reapers made a "sour, yellow note" that caused the rachni to viciously attack the salarians and asari.]]
* ''VideoGame/{{DuckTales}} [[VideoGameRemake Remastered]]'': The Yeti boss of the Himalayas attacks Scrooge [[spoiler:because of the Crown of Ghengis Khan stuck in ''[[SamusIsAGirl her]]'' foot.]]
* ''Videogame/ChampionsOnline'': The reason for the Qualar invasion in the tutorial; several devices in champion's headquarters are making a [[BrownNote sound]] that is "[[MemeticMutation driving the Qualar CRAZY!]]

* In one ''Webcomic/{{Oglaf}}'' [[http://oglaf.com/overbite/1/ strip]], a dentist-wizard ends a monster's rampage by curing the beast's impacted molar.

[[folder:Western Animation]]
* ''WesternAnimation/TheCareBearsAdventureInWonderland'' had the Jabberwocky, who was in a state of crankiness, due to a thorn stuck in his paw. With the combined effort of everyone, the thorn was removed, inciting the Jabberwocky's HeelFaceTurn.
* An episode of ''WesternAnimation/{{Doug}}'', with the eponymous character posing as his superhero persona Quailman, involved a giant monster created by Dr. Rubbersuit called Klotzilla that was rampaging throughout the city. Quailman then discovered that said monster had a thorn stuck in his foot and removes the thorn, helping Klotzilla from the pain he was in.
* In the second episode of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', Fluttershy manages to calm down an angry manticore attacking the group, and learns that its fury was because of a thorn in its paw.
* In ''WesternAnimation/TheSimpsons'', a bear that assaulted Homer was aggressive because of some electronic chip attached to his ear.
* ''WesternAnimation/EdEddNEddy'': In "Little Ed Blue", Ed becomes abnormally grump and bad-tempered, and goes on a rampage that genuinely scares the entire cast, all because [[spoiler:he has a pebble in his shoe]].
* ''WesternAnimation/SpongebobSquarepants'': "The Smoking Peanut" has a giant clam behaving this way. Everyone thinks it's because it had a peanut thrown at it, but later it turns out its egg was stolen.
** There was also one episode in which Gary is entirely unruly and goes around biting people. It turns out it's from a splinter. A very, very large splinter. Large enough to almost make this example a parody.
* ''WesternAnimation/DinkTheLittleDinosaur'': Dink and his friends had to convince a really huge dinosaur to help them in one episode. He initially refused, stating he had his own share of trouble, he had a thorn stuck on his foot.
* In ''WesternAnimation/DannyPhantom'', this is how Danny meets Frostbite.
* In the ''WesternAnimation/ChalkZone'' episode "That Thing You Drew", the Yadda Yadda Yeti turns out to be good-natured and was only acting fierce because she had a pickle dog stuck between her toes and it was causing her pain.

[[folder:Real Life]]
* It was suspected that the [[http://en.wikipedia.org/wiki/Rogue_elephant_of_Aberdare_Forest rogue elephant of Aberdare Forest]] behaved the way it did because it had a bullet lodged near the nerve center of its tusk.
* The maneating [[http://en.wikipedia.org/wiki/Leopard_of_Gummalapur leopard of Gummalapur]] had two porcupine quills stuck in one forefoot, making it unable to run after faster prey. Interestingly, the AndroclesLion trope is also present in this story, but with a twist: the hunter assigned to kill the leopard, Kenneth Anderson, fed a hungry stray dog that later helped him locate the leopard. Anderson called the dog Nipper and adopted him.
* Heartwarming example with a tiger [[http://quixylvre.tumblr.com/post/97038482448 here]]
* [[SubvertedTrope Subverted]] in the case of the Maneaters of Tsavo: one of the lions had a broken jaw that had healed, probably due to being kicked by a zebra or wildebeest, so it was initially assumed that it had become a maneater due to being unable to hunt its normal prey. However, an analysis of the Tsavo attacks showed that the lions were primarily hunting humans only during the dry season when herd animals were scarce. During the rainy season when the herds returned, the lion attacks slacked off, indicating that they were in fact merely targeting the humans opportunistically.