"It's my BLOOOOD!"Some people become a little squeamish when they see blood. Others... well, let's just say they don't take it nearly as well. This trope applies to whenever a character becomes incredibly deranged and/or powerful at the sight of their own blood. Perhaps their agility increases, or they become more alert, or they begin to realize their opponent is a serious threat and decide to go all out. In any case, their skills suddenly increase when they realize THEY are the one who's bleeding. The most cliched way this is depicted is for a man to take a blow to the face, causing his lower lip to bleed slightly at the corner. He wipes the blood with one finger, looks at it, and smiles, right before kicking ass. Often Truth in Television. Fighting males tend to restrain themselves until one of them is injured at which point the fight becomes "serious" and they use potentially lethal force. Females have a tendency to avoid fighting until seriously provoked, which causes them to engage in seriously injurious fights without a ritualistic or build-up phase. Somewhat related to Minor Injury Overreaction. Compare Critical Status Buff, which is a similar concept in Video Games. Contrast Afraid of Blood which deals with character having a phobia about blood.
— Gaara from Naruto
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Anime & Manga
- Mr. Heart, the Giant Mook from Fist of the North Star, who goes utterly ballistic when Kenshiro draws his blood during their major fight.
- As in the quote above, Gaara exhibits this trope when Sasuke lands a blow on him and manages to draw blood. Justified since, due to being constantly protected by his own sand powers, this is the first time Gaara has bled. Ever. He panics so much that at first he aborts his original upgrade and was in a funk for a good while afterwards. But once he adjusted to having been injured...
- One Piece does this with the character "Pearl" from Don Krieg's crew. When he find out that he has a small nosebleed he overreacts and starts becoming more frantic and uses more powerful moves.
- According to the crewmen, he grew up in "the jungle" where his instinctive response to any danger was to light a fire. He perceives the loss of any blood to be a sign of great danger and thus powers up.
- This tends to happen a fair amount in the first half of the series with Logia type Devil Fruit users. Their ability allows them to transform at will into a usually intangible element. Due to the relative rareness of Haki users (the use of Busoshoku Haki allows fighters to hit Logia users as normal), his means most Logia users may have gone months or years without ever being physically damaged. Most of them do *not* take it well when this happens.
- "Prince the Ripper" Belphegor from Katekyo Hitman Reborn! becomes more deranged and powerful at the sight of his own blood.
- "Ushishishi, the blood of the royal clan is flowing!"
- As the example pictures show, T.K./Takeru Takaishi reacts this way in Digimon Adventure 02 to Ken Ichijoji whipping in the face. To drive the point home, it was also mentioned in earlier episodes that Ken had martial arts training. TK doesn't. However, judging by TK's reaction to Ken's master plan, he was probably planning on punching his teeth in regardless.
- Dragon Ball Z: Vegeta's response to Goku drawing blood on him during their first major battle was an attempt to destroy the entire damned planet, leading to a spectacular Beam-O-War between him and Goku.
"Blood! My noble blood, spilled by the sheer luck of such - such trash?! No, I will not allow this to stand....I CANNOT ALLOW THIS TO STAND! YOUR INSOLENCE JUST COST YOU THIS WORLD! I'LL BLOW IT ALL TO PIECES, AND THERE'S NOTHING YOU CAN DO TO STOP ME!!!"
- It shows up again when Trunks attacks Vegeta to stop him from interfering in the fight against Cell. He's initially just stunned that Trunks followed through, but once he sees blood on his glove he becomes furious.
- Jean Jacquemonde from Spriggan turns into a werewolf and kills everything he sees moves when he sees his own blood.
- Whenever Leo Aoi of the manga Beast Master sees blood, his animalistic alter-ego emerges.
- At one point of Bus Gamer, Nakajou Nobuto gets his Achilles' tendon cut off by a random gamer. After explicitly stating blood fascinated him, he proceeded to beat the crap out of his attacker. Saitou asked why he was soaked in blood after he caught up with him. Nakajou told him it was mostly not his own blood, so he shouldn't worry. Did I mention he's a doctor?
- In Gamaran there's Sakon Daimaru. Normally he's a deadly warrior, but when he gets wounded and bleeds he becomes "scared" of his opponent... and puts much more effort in eradicating the source of his fear. Partly justified as Sakon's not quite right in the head.
- Later Shingo of the Myojin Ryuu (a huge guy wielding a 48 pounds spear) becomes even more dangerous and faster after being wounded twice by Gama.
- Carnage from Spider-Man. His symbiote, while similar to Venom's, has bonded to him by becoming part of his bloodstream. When beaten and reduced to normal, Kasady is a weakling (albeit homicidal), but the tiniest scratch will release the symbiote. For this reason he keeps one of his teeth filed to a sharp point.
- When Nico Minoru from Runaways bleeds, the Staff of One emerges from her body and leaves her well equipped to kick some ass. Of course, she's just as likely to summon it by making herself bleed.
- Cyborg, in his first origin issue, describes to his teammates how he got into a gang fight as a young man and got cut with a knife. In his words, "Man, I freaked out when I got cut an' saw my blood drippin' out. I fought back with everythin' I had..."
- EquestrianThrowdown's Miles Skylark weaponizes and overlaps this trope with Blood Magic and Blood Lust via his Nacht Jager
- A Link Between Worlds: The Novelization: In chapter 10, Yuga flies into a rage when Link gives him a clean cut across the eye with the Master Sword.
Yuga: You... mongrel! You dare leave a scar on this face?! I'll end you! I'll destroy every part of you! I'll Kill You!
- Dodgeball's Big Bad only starts to get really upset once he's been made to bleed.
White Goodman: "It's over between us, Kate. Nobody makes me bleed my own blood - nobody."
- In many a Bruce Lee movie, when you manage to wound him and draw blood, you'll have stunned him, then you see him taste his own blood, and then you can prepare your will because you've really pissed him off now!
Live Action TV
- Gibby from iCarly fights to save his friends with ruthless abandon, but only after his opponent bloodies his lip does he take off his shirt and begin really kicking ass.
- Part of Tazz's gimmick was him going into rages when he found himself bleeding. Tazz actually said it was a feeling he enjoyed having, even though he did fight better when he got it. In TNA he hypothesizes Kenny King might go through the same thing.
- Matt Hardy, as part of his "Version 1.0" gimmick, fought harder when he bled.
- TNA did an extended storyline where their masked monster, Abyss, had gone missing. His nerdy lawyer brother, Joseph Parks, came looking for him and pretty much abandoned the search when he got involved in the Ace's and 8's storyline. In storyline, Joseph trained to become a wrestler, but was fairly inept at it until he would see blood and go psycho and beat up his opponents. Eventually it was revealed to the surprise of no one in the audience that Joseph Parks was, in fact, Abyss.
- In Hong Kong Action Theatre, the Signature Move "Blood Rage" owes its existence to Bruce Lee above. If a character with this signature takes a wound without defending at all, his or her next attack on whoever delivered the wound is made at a +5 bonus to hit and does double damage if it connects.
- 4e Dungeons and Dragons has the "Bloodied" status, after losing enough hit points. Depends on the creature or character in question, this could trigger new and exciting effects. For both the bloodied victim, or someone fighting them.
- Kefka in Final Fantasy VI absolutely flips out when anyone injures him in the early parts of the game. "Blood, blood, BLOOD!" Later on, he gets tanked up on magic and starts to take it in stride.
- Inverted by Kuja in Final Fantasy IX. When he sees that Bahamut has made him bleed, he's delighted (given how great a feat this actually is) and decides to recruit it. By force.
- In Wet, whenever Rubi gets blood on her face, she goes berserk and the game cuts to her on an Unstoppable Rage.
- In Halo, Elites will get visibly pissed and become more ferocious when their blood is spilled after their shields pop. The Expanded Universe materials say that losing blood is a HUGE dishonor in Elite culture.
- The Sniper seems to start reacting like this after getting his cheek cut in the Team Fortress 2 short Meet The Spy, but he just gets backstabbed anyway.
- In the White trailer for RWBY, once the Giant Armor smacks Weiss and gives her a head wound, she kicks it into high gear.
- Used to awesome effect in this animation regarding 4chan's 'ROW ROW' incident. Basically, /v/ fights the hordes of /b/ users easily at first, but eventually gets caught up with by several of the members at once. He receives bloody scratches across his head. Cue energy nuke.
- Nelson the bully in an early episode of The Simpsons.
- In the Transformers Prime episode "Stronger, Faster," Megatron at first dismisses the idea that Ratchet could possibly be a threat. When Ratchet (who is jacked up on synthetic energon) hits him hard enough to cause some energon to leak from his mouth, Megatron touches it, looks at it, then proceeds to twist Ratchet's arm hard enough to incapacitate him, then punches a big hole in his chest.
Megatron: (after seeing his own energon spilt) ... All right, then.