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Percussive Prevention
Jessica Rabbit: Oh, no! Where's Roger?
Eddie Valiant: Roger? He chickened out on me back at the studio.
Jessica Rabbit: No, he didn't. I hit him on the head with a frying pan and stuffed him in the trunk. So he wouldn't get hurt.

Bob is about to do something that Dave considers stupid. He's going to attempt a Heroic Sacrifice (such as by becoming The Bait) or otherwise put himself in danger. At this point, Dave could try to reason with Bob, but Dave has a better idea.

He punches Bob in the face. (The gut and/or solar plexus are also popular areas.)

Nine times out of ten, this will render Bob unconscious, and if it doesn't, it subdues Bob long enough for Dave to take Bob's place or remove him from danger. Dave may get yelled at for this or punched in return if Bob is really put out, but Dave will most likely respond that he did what he had to do.

A subtrope of Cruel to Be Kind, since knocking your friend over the head is not something that sounds positive out of context.

A common reason for this is that the character punching you out is More Expendable Than You. Compare Get Ahold Of Yourself Man, Dope Slap and Don't Say Such Stupid Things.

Examples:

    open/close all folders 

    Anime and Manga 
  • In One Piece, Luffy knocks out Mayor Boodle when the old man tries to challenge Buggy the Clown. In a later episode, Zoro knocks Sanji out to keep Sanji from effectively sacrificing his life to a high-powered government thug in Luffy's place.
  • In Eyeshield 21, Homer punches Panther in the face to prevent him from attacking their racist coach, which would get him kicked off the team and possibly out of the school. In a later episode, Tetsuma smacks Monta around to keep him from going ballistic on the referee and getting his team thrown out of the Fall Tournament.
  • In Dragon Ball Z, Vegeta knocks Goku, Trunks and Goten out (in that order) to keep them from fighting Buu.
    • In the alternate future, Future Gohan knocks Trunks out to keep him from fighting the androids. By the time Trunks wakes up, Gohan is already dead.
    • And in the Abridged Series, Goku does this to Jeice while Jeice is giving a monologue. Only Goku wasn't trying to stop his speech, he was trying to get Jeice to fight.
  • Happened to Naruto in the second movie.
    • In the main series, Hyuuga Hiashi's twin brother Hizashi knocks him out with a punch to the solar plexus in order to take his place as a human sacrifice.
  • In Angel Sanctuary an already dying Kira punches Katou in the stomach in order to essentially commit suicide. Or maybe it was just a case of Taking the Bullet.
  • In JoJo's Bizarre Adventure, Kakyoin shoots Polnareff with an Emerald Splash to knock him out of the way of Hol Horse's bullet.
  • Bleach Soul Society arc.
    • While getting Orihime away from the scene of a battle between Uryū Ishida and Captain Kurotsuchi, a Soul Reaper knocks her out to keep her from going back to help Uryu.
    • When Ichigo tried to confront Captain Kuchiki outside Rukia's place of imprisonment, Yoruiki rendered him unconscious and escaped with him. She knew he wasn't strong enough to fight Captain Kuchiki yet and would just get himself killed.
    • Used again with Orihime and Chad during the Fullbringer arc. Urahara and Isshin were able to knock Chad and Orihime since they were kinda distracted while Tsukishima was busy Mind Raping them.
  • In Inuyasha, the "sharp shot to the solar plexus" move was once used by Miroku to subdue a peasant girl whom he was trying to move to safety.
  • Done a few times in Keroro Gunsou, like in episode 2 where Keroro drops about a dozen metal wash basins on Momoka's head to stop her from pelting Tamama with volleyballs... and thus prevent her from provoking Tamama into retaliating violently.
  • Great Teacher Onizuka has Onizuka put bossy, self-righteous Vice-Principal Uchiyamada in a German Suplex for trash-talking some angry delinquents he'd had expelled from school. Which pacifies the delinquents and prevents them from doing anything worse to Uchiyamada.
  • Used occasionally in Fairy Tail, usually by Gray and Natsu on each other when one of them is too injured to fight but too stubborn not to. Erza also employs this on Natsu once to save him the pain of crippling motion sickness.
    • Natsu inverts this on Erza, knocking her out with a punch to the stomach in order to fight Jellal for her.
  • Yu-Gi-Oh! has the first duel between The Pharaoh and Dark Bakura. Dark Bakura has just set Man-Eater Bug in defense mode (read, anything that attacks it sets off its ability, which kills any monster on the field, and it's set to go off next turn anyway). Tristan attempts to attack it and take the ability to save his friends. This earns him a sword hilt to the stomach, courtesy of Flame Swordsman!Joey, who proceeds to do it himself.

    Comic Books 
  • In Nintendo Power Comics' version of the Star Fox story, Falco knocks out Fox to prevent him from attempting to fly though the black hole, and offers to go in his place, arguing that Fox is a better dogfighter, but he [Falco] is a better pilot.
  • In one of the only times that he hits a woman, Marv from Sin City does this to Wendy in order to spare her from watching him torture her sister's killer to death, something that would "give her nightmares."
    • Lucille, Marv's parole officer, does the same to Marv earlier on to stop him from fighting the cops after the escape from the farm, saying that she's not going to let him get either of them killed. Unfortunately for Lucille, the cops sent to the farm turn out to be a death squad who proceed to murder Lucille after she tells them what she knows.
  • During Walt Simonson's run on Thor, Thor, Balder and Skurge (a former Thor villain known as the Executioner) lead an army of souls in a daring escape from Hel, the Norse underworld. The souls must cross the bridge of Gjallerbru, with an army of demon warriors on their heels. Thor orders Balder to lead the souls to escape while he holds the bridge. Skurge knocks Thor out and tells Balder, "You and Thor have a drink when you are next in Asgard and laugh Skurge's last laugh together. I will hold the bridge." Skurge then holds the bridge with two M-16s, going down in what can only be defined as a Crowning Moment Of Awesome. Or, to quote the closing narrative;
    They sing no songs in Hel, nor do they celebrate heroes. For silent is that dismal realm and cheerless.
    But the story of the Gjallerbru and the lone god who defended it is whispered across the Nine Worlds. And when a new arrival asks about the one to whom even Hela bows her head, the answer is always the same.
    He stood alone at Gjallerbru. And that answer is enough.
  • During an arc of Justice League of America, Captain Marvel punches out Superman in order to take his place on a trip to the 5th Dimension, where Captain Marvel's abilities are somewhat better suited to the task.
  • In the classic Sun-Eater storyline in Legion of Super-Heroes, Ferro Lad knocks out Superboy and takes the bomb into the heart of the monster in a Heroic Sacrifice, knowing that the red sun radiation from the Sun-Eater would have rendered Superboy vulnerable to the bomb.
  • During a Walt Simonson arc of the Fantastic Four, Reed Richards refuses to escape from a site targeted for imminent destruction without rescuing Sue and Johnny first, prompting Ben Grimm to knock him out and cart him off to safety. After the place blows up and (apparently) kills the Storms, Reed predictably flips out at Ben, who justifies his actions in an unexpected reversal of their usual Red Oni, Blue Oni roles by reminding Reed that while the two of them would would have gladly died rather than leave Sue and Johnny behind, the entire universe is about to be annihilated and without Reed, the others along for the ride — Thor, Iron Man, and Ms. Marvel — would have no chance in hell of saving it.
  • In Green Arrow #24, Shado knocks Green Arrow to prevent him going to fight Count Vertigo while injured, then goes to fight Vertigo herself.
  • Daredevil kicks the new White Tiger off a building so she won't try to fight Bullseye.
  • Hacken is too thick skulled for this to work, in every sense of the word.
    • "Hey, Tommy, I think somebody hit me in the back of the head! Did you see him?"
  • When the sheriff of Laastekist lets Frank out of his cell to fight the crminals infesting his town during the Suicide Run event, Frank knocks him out so he won't be in the line of fire.

    Fan Works 

    Film 
  • Who Framed Roger Rabbit: Jessica Rabbit hits Roger with a frying pan to keep him out of harm's way. It does make perfect sense for Roger, who is only temporarily incapacitated by physical violence, to keep him out of the way of villains using Dip, which could kill him.
  • Sky Captain and the World of Tomorrow: Joe punches Polly to stop her from helping him destroy an art-deco flying rocket-ship ark. Subverted, as she isn't really knocked out, and ends up saving his ass...right before punching him back.
  • Tremors. Valentine elbows Earl in the stomach to stun him so Valentine can risk his life running to the tractor to save everyone (and risk being killed by the Graboids).
  • One of the big scenes in Shane. Except instead of going down with one punch, Shane and Starrett end up in a knock down drag out fight to see which one of them gets to ride into town and face down The Gunslinger that's been hired to kill Star.
  • They Live! has a scene similar to this, in which two barely acquainted people proceed to beat the crap out of each other for a full five minutes over one getting the other to put on a pair of sunglasses that let the wearer detect all the hidden brainwashing messages in popular media.
    • This is largely Fanservice. One of the characters was played by Roddy Piper, and they were doubtless expecting a lot of pro wrestling fans to be watching.
  • Punisher: War Zone has Frank doing this to a character before going in a house full of armed crooks.
  • Van Helsing was originally going to punch Anna Valerious in the face to keep her from going out to hunt Dracula. When watching the dailies, director Steve Sommers realized how bad this looked, and reshot the scene so that Van Helsing used a spray of knockout gas instead.
  • At the climax of Star Trek II: The Wrath of Khan, the Enterprise's warp engines are damaged, and repairing them would require exposing someone to large amounts of radiation. Spock immediately heads to the engine room to try to make the repairs himself. McCoy attempts to stop him, but Spock nerve-pinches him and ends up sacrificing his life so the crew can survive.
    • Echoed in the new movie Star Trek Into Darkness, where Kirk thumps Scotty and straps him into a chair before going into the core himself.
  • Parodied in the movie Almost Heroes. Chris Farley's character attempts to do this to another character, but it doesn't knock him out. After he starts to pick up a big rock, he's told to just go ahead.
  • In Pirates of the Caribbean: Dead Man's Chest, Elizabeth fights her way through a Bar Brawl started by Norrington in order to knock him out before he gets himself killed by the other bar patrons.
  • In The Thin Man (from 1934!), Nick punches Nora out cold to get himself (and her, and Asta) out of a sticky situation. She's not too happy when she comes to, but she lets him off the hook when he explains. Then they have a drink together.
  • Armageddon: A.J. (Ben Affleck) has to be the one to remain on the asteroid and detonate the bomb, after drawing the short straw. Instead, Harry (Bruce Willis) disconnects an oxygen tube from his space suit, forcing him to go back to the shuttle and let Harry do the job.
  • In The Dark Knight, Bruce Wayne is having a party in Harvey Dent's honour, and The Joker shows up at the penthouse looking for Dent. Bruce sneaks up behind Dent, puts a sleeper hold on him til he passes out, then locks him in a closet. This is presumably because Bruce knew Dent would try to put on a brave face in front of the Joker, and he just wanted him to be safe while he suited up and faced the Joker himself as Batman.

    Literature 
  • In Animorphs #46, Ax knocks out Jake so that Jake won't have to bear the responsibility for Ax's plan to threaten Visser Two with the nuking of the Yeerk Pool (and therefore, the Animorphs' hometown).
  • Battletech: Galen Cox slugs this trope in Victor Steiner-Davion's face when he is determined to return to the battlefield to save his command. He wakes up in a dropship leaving the atmosphere of the planet he was assigned to for safety.
  • Discworld: Vimes does this in Night Watch at one point to stop his younger self from getting himself killed.
  • Lelldorin in the Belgariad mentions to Garion, while describing his (Lelldorin's) flight from Vo Mimbrae, that he punched out a friend of his "because I didn't want to hurt him". (If the friend had had the chance, honor would have demanded he fight Lelldorin to the death.)
  • A Storm of Swords: Sandor Clegane knocks Arya unconscious with the flat of an axe to keep her from charging into the Red Wedding in a suicidal attempt to save her brother and mother.

    Live Action TV 
  • On The X-Files, Scully shoots Mulder to keep him from killing Krycek. And as he lampshades, he's lucky she as Improbable Aiming Skills because he comes out none the worse for wear.
  • Star Trek: The Original Series:
    • In "Obsession", Ensign Garrovick tries to knock out Captain Kirk with a judo chop so he can be the one to lure the vampire cloud to the antimatter bomb.
    • "The Empath": McCoy knocks out Kirk and Spock with Instant Sedation drug injections so he will be the one to be taken and tortured by the Vians.
  • Star Trek: Deep Space Nine
    • In the episode "Once More Unto the Breach", when Worf prepares a suicide mission to protect the crew of a Klingon ship from the Dominion, Kor knocks him out and does the Heroic Sacrifice.
    • In "The Die is Cast" Bashir does this to Garak when Garak refuses to leave his (evil) old mentor behind on an exploding ship.
  • MST 3 K episode "Puma Man" has the inscrutable Aztec hero knock out the Designated Hero so that Aztec can go on a suicide mission alone.
    Crow T. Robot: Yes! The Aztec speaks for all of us!
  • Doctor Who, "Forest of the Dead": River Song knocks out the Doctor to prevent him from sacrificing himself, and takes his place instead.
    • A similar thing happens in the 4th season episode "The Poison Sky". The Doctor's going to go and destroy the Sontaran ship, and Luke Rattigan quickly gets his own teleporter working, teleports up, knocks the doctor back into the teleporter and destroys the ship himself.
    • The original series did it as well, in "The Ark in Space", when The Doctor and Rogin, a space technician need to decide who stays and gets killed when the rocket they're working on blasts off.
    Rogin: You don't want trouble with the Space Technician's Union, Doctor! * Thump* That's my job!
    • In "Battlefield", the Brigadier one-punches the Seventh Doctor and faces the Destroyer on his own.
  • Buffy the Vampire Slayer applies some Percussive Prevention to her watcher, Giles, on more than one occasion. The original was in the first-season finale, wherein after Buffy has her 10-Minute Retirement over her prophesied death and the associated She's Back moment, Giles tells her he is going to face the Master in her stead, and "there's nothing you can say that can change my mind." Buffy replies that she knows, and then roundhouse punches him. Thud.
    • Later, Giles's "unfortunate tendency to get knocked on the head" by friends and foes alike becomes a bit of a Running Gag.
    • In the Spin-Off Angel, Doyle punches Angel off a high platform to take his place in a Heroic Sacrifice.
  • In Farscape, John fails to resist Scorpius, gives up and tells Aeryn he's going to turn himself in. Aeryn knocks him out.
  • In LOST, Charlie knocks out Desmond when he tries to take his place swimming to the underwater Dharma station.
  • In Highlander: The Series, Methos once shot Duncan in the heart to keep him from participating in a duel where he was sure to get killed. This being Highlander, Duncan was none too pleased when he healed up.
  • Horatio Hornblower (1998 2003) has two examples from "The Even Chance" (AKA "The Duel"):
    • Mr Midshipman Clayton knocks Mr Midshipman Hornblower out with a tiller just before Hornblower is due to go fight a duel with Mr Midshipman Simpson, taking his place as his second. He thinks that as an older and more senior officer, it's him who should deal with Simpson, not Hornblower who is just a boy in his eyes. Simpson is wounded, Clayton is gutshot, living just long enough for Hornblower to come round, reach the shore and listen to his Last Words.
    • Later in the same episode, when Mr. Midshipman Kennedy is suffering a seizure while they attempt to sneak up on a French warship, Mr. Midshipmen Hornblower gives him a Tap on the Head, before leaving the unconscious man in the boat while they board the ship. Mr. Midshipman Simpson casts the boat adrift and we don't see the man again until two episodes later.
  • Most everybody in Smallville. Do they have a trauma ward in that hospital?
  • On Oz, in the long feud between Beecher and Schillinger, Schillinger gets his son to kidnap Beecher's children and kill one of them. In retaliation, Beecher arranges to have Schillinger's son killed, but feels remorseful afterwards. So remorseful, in fact, that when Schillinger is about to find out that Beecher was responsible Beecher decides to own up to it. Keller wants to confess to the crime instead so that Beecher won't become a target. Beecher tells him no. Keller knocks Beecher out so that Beecher can't stop him from taking credit for the murder and then runs off to do so.
  • Game of Thrones gives us an accidental example. Tyrion Lannister, a man with dwarfism and no experience at combat, is about to personally take part in a battle on his father Tywin's orders. Thankfully (though embarassingly), one of the charging warriors under his command accidentally whacks him upside the head with his hammer, rendering him unconscious for the remainder of the battle.

    Newspaper Comics 
  • Modesty Blaise: In "Milord", Willie knocks Modesty out so she cannot interfere with a group of women taking their revenge on the men who raped and tortured them.

    Webcomics 

    Western Animation 
  • Hawkgirl to Hawkman in Justice League Unlimited.
  • Parodied on The Simpsons, when Homer tries to stop Barney from driving drunk by knocking him out. After getting whaled on with fists, a tire iron, and finally having his head slammed repeatedly in a car door, Barney remains very much conscious and a little bit confused at what Homer is up to.
    Ow! Cut it out. Ow! Ow! Ow! Ow! Ow! All right, here, take the keys.
  • In the World War I-set Looney Tunes cartoon "Dumb Patrol", Porky Pig was selected for a dangerous air mission, but Bugs Bunny dropped a brick on his head.
    "Y'know, I just had to take his place. He's got a wife and six piglets."
  • Danny Phantom: Happens in Reign Storm when (in no particular order) Maddie, Jazz, Mr. Foley, Mrs. Manson, the mayor, civilians, and the police push each other to the ground fighting over who will fight Pariah Dark and possibly die in the Ecto Battlesuit. We even get this little gem:
    Danny: I thought I was going to have to blast everybody with a ghost ray, but this is much more efficient.

    Video Games 
  • Metal Gear
    • Metal Gear Solid 2: Even Mission Control suggests that you knock E.E out and drag her in order to get past some scary bugs on the floor.
    • In Metal Gear Solid 3 punching out Eva and dragging her is the best way to keep her from doing something stupid that might attract enemy guards. Also saves on food since her stamina doesn't go down while asleep.
  • Happens twice in Suikoden II once early in the game, Tsai of the Holy Spear may knock out two of the main characters to preventing them from fighting against Luca Blight, and later on the game Flik knocks out e major of Greenhill to prevent her turning herself in to the enemy army.
  • In the finale of Captain Rainbow, the island is facing destruction, and Hikari tells you to escape on the last wishing star. You can refuse, but Hikari will still insist you go. Since she won't take no for an answer, you knock her out, put her on the star and send her off to safety.
  • In Grand Theft Auto IV: The Ballad of Gay Tony, Tony is ordered to kill several men with a supply of satchel charges. Knowing that he's drugged up and has no clue how to use them, Luis knocks him out and does the job himself.
  • In the early days of Dungeons & Dragons Online, the "Threnal" quest chain was infamous for a hold-the-line quest wherein you needed to protect an NPC who liked nothing better than to charge every group of monsters — and consequently draw too much aggro and get himself killed. Nowadays, he can be knocked unconscious with a dialogue option.
  • This happens in Dynasty Warriors 7 during Shu's story mode. At the battle of Yi Ling, Liu Bei tries to take on the entire Wu army by himself to get revenge for his fallen sworn brothers. Zhao Yun, who had pleaded with him to fall back, finally stops him with an elbow to the stomach, which knocks him out, leaving him to be carried away from the battlefield by some allied troops.


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