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- There's a long list of things you shouldn't do if you want to survive a meeting with Golgo 13. Among them: don't touch his right hand, don't reach into your coat, and don't open a handbag. (He will attack at all of these.) His habit of standing when he meets a client comes from an early occasion where he killed a client's aide — the poor man made the mistake of walking up behind him while he was seated.
- Naru from Love Hina has a He Is Not My Boyfriend! reflex, whenever someone mentions Keitaro. She even does it after they're engaged.
- In Kenichi: The Mightiest Disciple, Miu was trained at a young age to automatically flip anyone who approaches her from behind.
- In Pokémon, Jessie and James's urge to say the motto can be triggered by anyone saying the words "prepare" and "trouble" in close succession. Try as they may to resist, they will blow their cover.
- InuYasha. Two words: "SIT, BOY!" (Literal restraint in this case. Is sometimes the only way to stop him, especially when he is out of control.)
- An old comedy sketch, made popular by The Three Stooges, had one man explaining to a stranger how his wife ran off with another man. Since he caught up with them at Niagara Falls, he goes berserk every time he hears those words...
- A similar sketch, performed by Abbott and Costello among others, involves a guy being roped into selling hats for the Susquehanna Hat Company. He goes up to various customers, trying to sell a hat, only to have them react in shock, horror and outrage at the mention of their name for various reasons ("my wife was wearing a Susquehanna hat when she died!", etc.). This happens several times, and when his last customer approaches him and asks him if he's selling Susquehanna hats, it doesn't end well.
Films — Animation
Films — Live-Action
- The Tuxedo:
- The title tux always sends someone flying if they tap on its shoulder.
- And smoothly pulls out a lighter if someone puts an unlit cig in their mouth.
- In Abbott and Costello's Hold That Ghost, one of the heroines is being followed down the stairs by a man with a sheet over his head, who's miming her footsteps to hide his own. She gets suspicious, and taps out "shave and a haircut" with her feet and his cover is blown when he finishes with the "two bits."
- In Legally Blonde, the lawyer played by Luke Wilson confirms Elle's suspicion of a witness's homosexuality (thereby discrediting his testimony) by asking rapid fire, innocuous questions ("How long have you been working for the defendant? What was your job?" etc.) before ending with, "And your boyfriend's name is?" The witness answers reflexively, outing himself.
- US Marshal Gerard exploits this in The Fugitive when he isn't 100% certain that he's spotted Richard Kimble, the titular character. So he calls out to him—"Richard!". Kimble involuntarily looks up, instantly giving himself away.
- In the original script Kimble actually manages to check this. He doesn't look up, but he does freeze in place for a few seconds before continuing down the stairs. The lack of response tips Gerard off just the same, especially since others in the stairwell display this trope by looking up.
- Inverted in an urban legend about the trial of a man accused of murdering his wife, though no body was found. The defense attorney said "You can't know she's dead. She could walk through that door right now!" and pointed with at the courtroom door with such energy that everyone in the room turned to look. The prosecuting attorney responded that he saw every head turned — except the defendant's. "He knew she wasn't going to walk in. He killed her."
- According to Himaruya, the author of Axis Powers Hetalia, a German army decided to bait out an Italian soldier by calling out a relatively common Italian name. The soldier with that name came out and said, "I'm here!" and the Germans got him. Later when the Italians decided to do it back to them, they had an Italian soldier yell out a common German name. The German soldier with that name came out and said, "Who called me?" "Me!" replied the Italian soldier. The German shot him right there. This joke in fact predates World War I.
- In the book The Wooden Horse, telling Mostly True Story of a WWII POW escape, the two British escapees are talking with Polish partisans trying to get aboard a ship leaving German territory. The partisans ask them a number of questions to ferret out if they are German spies, when one suddenly reaches out and slaps one of the escapees. His exclamation of "What the bloody!" in English is the final confirmation for them.
- In Men at Arms, Gaspode the wonder dog uses his ability to "speak human" on a pack of feral dogs by taking advantage of a Dog's instinct to obey a sharp human voice to SIT. In the air.
- In The Fifth Elephant, Vimes kills a werewolf by throwing a flare that the wolf instinctively tries to fetch. Ouch.
- In Friends, Phoebe teaches this method to Joey, Chandler, and Ross, which drives the central plot of the episode.
- Agent 99 of Get Smart instinctively judo throws anyone who sneaks up behind her. She also does it when she attempts to explain this.
- In season 6 of How I Met Your Mother, when Lily announces that she is pregnant, Barney immediately screams "I've never slept with that woman before in my life!"
- In an episode of Full House, DJ gives her father a very mature and well thought out presentation on why she should have her own room. Danny asks for a few minutes to think it over, then tells her he's made his decision. DJ immediately yelps, "Dad, that is completely unfair!" A perplexed Danny tells her he hasn't even said anything yet, at which point a sheepish DJ admits that it's "force of habit". Apparently, years of watching her father take her younger sisters' side over hers had conditioned her reaction — indeed, she's downright stunned when Danny agrees with her.
- In an episode of Sherlock, "A Scandal in Belgravia", Sherlock is looking for Irene Adler's cell phone, which has incriminating pictures on it. While he talks to her, John steps outside and lights a magazine on fire, triggering the smoke alarm. When Irene hears the alarm, she instinctively looks at a mirror on the wall that conceals a hidden safe, pointing Sherlock directly to the phone.
- In one "Weekend Update" sketch from Saturday Night Live, Jimmy Fallon believes that Tina Fey is about to tell the viewers that he has a small penis, and suckerpunches her in the face. She asks if his paranoia is proof that it's true, and he hits her again. She then blurts out "small penis" and gets hit yet again. When she glares at him, he giggles nervously and explains that "It's an instinct."
- On QI, this is one way the producers trip up the contestants in the General Ignorance round (where giving the obvious answer is usually the incorrect one and will cost points).
- On WKRP in Cincinnati Les rewrote the station's emergency handbook so that it only covers Soviet invasions. When a tornado hits Cincinnati he's forced to improvise by reading it on the air and replacing the word "communist" with "tornado," so he urges Cincinnatians to stand up to the "godless tornados."
- Law & Order: UK. Detectives Brooks and Devlin have arrived at a junkyard to look for a murder suspect. When they're told the man in question isn't there, they suspect otherwise. Devlin casually calls out, "Oi, Freddy!". Sure enough, Freddy looks up at the sound of his name, then further confirms his identity by bolting when he sees the cops.
- Since the very beginning, World of Warcraft features damage zones, glowing circles of poison, fire, darkness, whatever. The message ingrained into every competent player's head is that if a glowing circle appeared under you, move out of it immediately or die. In the Cataclysm expansion they give several healing classes an area of effect, over time heal that took the form of... a glowing circle on the ground. Unsurprisingly, everyone is having to fight the urge to move out them. It's probably worst for druids; while shamans have blue and priests have yellow, neither of which is a common boss damage circle color, druids' circles are green, and thus resemble a cloud of poison.
- In Team Fortress 2, many players run away or shoot at The Pyro, lest they die a horrible, burning death. The thing is, it's rather stupid to run away or shoot at a Pyro on your team, as they are excellent at finding cloaked Spies, deflecting rockets and grenades, and can extinguish you if you happen to run into an enemy Pyro (who you should shoot and/or run away from). Particularly annoying for the Pyro if an allied Scout is on fire and is screaming to be put out, but keeps rushing and jumping everywhere, and won't stand still to be put out. This is most likely because Scout players have it drilled into their heads that a motionless Scout is a dead Scout, due to being a Fragile Speedster.
- In a Shadowrun sourcebook, iconic character, Hatchetman, is telling of his slow evolution from street punk to cyber samurai. At one point, he comments on how he used to snicker at older streetsams who would normally stand with their backs to the wall for being paranoid, only to get the "wired reflexes" mods himself, and finding himself doing the same thing to keep himself from reflexively striking somebody coming up behind him. He isn't paranoid of being hurt, but of hurting an innocent.
- Felicity from the webcomic The Dreamland Chronicles has to steal anything sparkly, no matter what sort of life and death situation the protagonists might be in at the time and how ill-advised stealing the glowing magical pendent hovering in mid-air might be. It's surprising that she's not an anthromorphic ferret or magpie, but rather a cat.
- Dark Smoke Puncher in The Adventures of Dr. McNinja is pulled over by a cop, who asks "Son, do you know what I'm stopping you for?", and DSP instantly continues the line from "99 Problems". The Alt Text confirms that it's like Roger Rabbit with "Two Bits".
- Freefall: "BALL!", "DOGGY!", "FRISBEE!"
- Keychain of Creation: The Solar Exalted of the First Age developed many means to control their Lunar partners.
- In one strip from Girl Genius, Agatha humiliates Krosp the genius uplifted cat by showing that he still has a hair-triggered kill-response to a dangling piece of string.
- The Order of the Stick: Haley gets to play with Tarquin's arrow-catching reflexes by firing two arrows toward his head while he's hanging on the railing of the Mechane. He does snatch both out of instinct, but doing so makes him lose his grip on the side of the ship.
- In the Green Lantern episode of Duck Dodgers, when Dodgers actually agrees to Sinestro's hero-villain seduction speech, Sinestro goes on to call him a fool for rejecting before realizing that this time, someone actually said yes.
- In one episode of Bonkers a toon criminal forces Bonkers to activate a deathtrap by placing a "Do Not Press This Button" sign on the activation button. As a toon, Bonkers is incapable of resisting a temptation like that.
- In an episode of The Simpsons, where Lisa is doing something bad:
Marge: Bart, nooooo!
Bart: (standing right beside her) What?!
Marge: Sorry, force of habit. Lisa, nooooo!
- American Dad! has a similar joke in an earlier episode, where Steve gets impregnated by Roger. When Stan finds out, his immediate response is to yell at Hayley for "tarting around town". She angrily points out that she didn't do anything, and Stan says that he always assumed this would happen to Hayley, so it's what he's prepared for.
- Tom and Jerry: Tom has used the Dog's urge to fetch to get Spike off his back, only to come across the problem that once a Dog starts fetching, they won't stop.
- Bugs Bunny and Daffy Duck has pulled the fetch stunt on a few hunting dogs a few times during their career as well.
- Chip 'n Dale Rescue Rangers: Monterey Jack's Follow Your Nose reactions upon smelling cheese.
- Family Guy characters know Brian can't resist fetching objects.
- The studies of Ivan Pavlov have become famous for demonstrating this in dogs. He would ring a bell every time that food was served to the dogs, and eventually the sound of the bell would connect instantly to the idea of food being brought; hence, when he rang the bell, the dogs would salivate more and expect the food to be brought out even if there wasn't any.
- Some torturers have been known to use Coca-Cola bottles to beat or sodomize victims, because they know that the Coca-Cola franchise is one of the most prevalent in the world; even if their victim is released, they will be confronted with reminders of their terrible torture forever onward through advertising.
- The ever-popular "Check her out!" "Who, where?" Especially funny when the person being baited is married and/or in a serious relationship, and his wife/girlfriend is right there, forcing him to backpedal. "Whoever she is, she can't be as pretty as you are!" or "Who cares, I have the most beautiful woman in the world right here!"
- A surprising real life example: Once, when police were entering a house to look for a burglar, one of them said "Marco" in order to inject some humor into the situation. Guess how they found the burglar?
- Two men were on trial for burglary, and a possible witness was on the stand. The prosecutor, leading up to asking her to identify the people she had seen entering the house, asked, "are the men who broke into the house in the court room here today?" The defendants raised their hands.
- Apparently, during World War 2, it was possible to ferret out German infiltrators among Allied prisoners of war by randomly shouting "Achtung!" and seeing who reacted by reflexively coming to attention.