Sarah: Well, 'cause... you just gave me a ring, mothafucka!
Druglord: OH SHI—[boom]
The pin is pulled from a grenade on a grenade belt, putting the wearer and anyone in the immediate vicinity in danger of being blown up by their own grenade(s). At this point, one of two things will happen.
- The wearer realizes their danger, yanks the belt off, and tosses it somewhere else, possibly at the person who pulled the pin.
- They are indeed blown up.
It can be used to elaborately kill a tooled-up enemy or as a makeshift suicide belt. Expect it to be used on a nearly triumphant enemy leading to a cathartic Oh, Crap! moment for the villain before he explodes.
As for why it's called a Pineapple Surprise, British and American World War and Vietnam-era grenades were nicknamed "pineapples", due to their shape (note the trope image.) Incidentally, WW2 German grenades were called potato mashers (they had a handle which increased their throwing range). Most modern grenades are spherical.
- At the beginning of the final battle between Accelerator and Kihara in the second season of A Certain Magical Index, the former takes out three mooks with this trick. The only remaining one promptly craps himself and tries using the Damsel in Distress (Accelerator's Morality Pet Last Order) as a Human Shield. Accelerator doesn't appreciate it.
- Done famously in Jo Jos Bizarre Adventure Battle Tendency by Joseph Joestar against Straizo. The latter being a superhuman vampire, along with knowing how to use the Ripple, Joseph had no chance at a plain brawl. So as he runs away, he reveals that he had somehow snuck not one, but several grenades, strung together, onto his opponent's clothes, and his running away made him unpin all the grenades at once.
- In Kenichi: The Mightiest Disciple, during her first escape attempt from Yami's base, Shigure Kosaka pulls the pins on a mook's three grenades with her toes. To his credit, the mook manages to throw the grenades away in time.
- Played for laughs in the Kochikame manga. Military crazed cop Volvo Saigo who's armed to the teeth has accidentally released his pins when fastening his seatbelt and from swimming. Since this is a cartoon, he gets better.
- Stephanie Brown does this to her father the Cluemaster in Batman Eternal #3; pulling the pin on one of the smoke canisters hanging on his costume when he tries to shoot her.
- Happens to a mercenary in Danger Girl and the Army of Darkness when his possessed hand pulls out the pins of the grenades he is wearing on his vest.
- Abbey herself pulls this on an enemy early in the original Danger Girl comic.
- In Secret Wars (2015), one domain is ruled by the Regent a Corrupt Corporate Executive who uses dead superhumans to empower himself in order to try and pull a coup on God Doom, and he's looking for Spider-Man, to get his invaluable Spider-Sense. When his Sinister Six try to track Spidey down, putting not only him at risk, but his wife and daughter, they find out a) as Kraven accurately points out, they're dealing with Spidey in Papa Wolf mode, b) he's not playing nice, c) one of the nastier applications of his webbing. Specifically, webbing one of Hobgoblin's pumpkin bombs to his hand when he's about to throw it. Cue the inevitable. As he puts it? "Hobgoblin, everyone. Let's give him a hand. Not funny? Good. I'm done joking."
- Hack/Slash: In Interdimensional Women's Prison Breakout, Samhain does this to Bomb Queen: as she slaps a paralysis disk on his back, he pulls out the pins of all the grenades on her vest.
- In the "Hunter's Hellcats" story in Our Fighting Forces # 107, pickpocket Light Fingers does this: hiding and pulling the pin from from a grenade on one of the Japanese patrol which is pursuing them.note
- During a flashback to Jesse's father's time in Vietnam in Preacher, a group of soldiers find an old Vietnamese woman crouching in a hut. They try to talk to her, only for her to hold up a pulled grenade.
- Jon Sable pulls this trick in Shaman's Tears #8: yanking the pin out of one of the grenades on a bandoleer worn by one of the nestlings as he flees their sewer lair.
- In the Six Guns mini-series, the Two-Gun Kid shots a flashbang off the vest of mercenary, causing it to detonate.
- In the comic Star Wars: Vader Down, after his TIE fighter sustains heavy damage Darth Vader has to make an emergency landing on a planet where the Rebel military has a post and was conducting drills. When surrounded by hundreds of rebel soldiers, Vader uses the Force to pull the pins on their grenades as they demand that he surrender, wiping out most of them before subjecting the survivors to a Mook Horror Show.
- During a day out with Cessily, X-23 performs this during one of her battles with her former handler Kimura
- In the Discworld of A.A. Pessimal. student Assassin Famke Smith-Rhodes-Stibbons is shown how to deliver a crockett ball. Her older sister's boyfriend, a keen crocketter, is deliberately teaching her something enjoyable involving accurately aiming a very hard ball at a very fast speed, so as to get her on side. Famke enthuses that this could be usefully applied to the sort of explosive Devices her mother teaches Guild students to use. Her sister reflects that this is just what the Disc needs: Famke plus hand grenades. Famke is the sort of keen student who is tipped to go far in the Guild of Assassins.
- The Mass Effect Fanfiction Uplifted features the quarian Captain Hanala'Jarva fumbling throwing a grenade. Joachim Hoch grabs it to throw it further. He loses his arm doing so.
- Batman: Assault on Arkham: After he escapes from his cell, the Joker confronts one of the patrolling guards. The guard has just enough time to realize that the Joker is twirling a grenade pin around his finger before the tear gas grenade on his belt goes off.
- In the remake of Assault on Precinct 13 (2005), one of the characters does this while about to be executed by the Corrupt Cop bad guys. It was only a flash bang, but it still caused a significant injury and distracted the captors enough for an escape attempt.
- At the climax of Birds of Prey, Cassandra is being held hostage by Black Mask with a gun to her head. She apologizes to Harley and tells her that she stole something of her ring: her ring. She then holds up her hand, showing a grenade pin dangling off her finger. Black Mask is confused, then realizes Cassandra has palmed one of her grenades into his pocket and pulled the pin. While he is searching for the grenade, Harley grabs Cassandra and knocks him off the pier. He explodes before he hits the water.
- Captain America: The First Avenger: Captain America pulls the pin on a grenade being carried on the back of HYDRA bike during a bike chase.
- Casino Royale (2006): A bomber tries to use a tiny keyring bomb attached to a fuel tanker to blow up a plane. After a long fight with Bond, the bomber triumphantly pushes the switch on his detonator...only to realize that Bond had attached the bomb to his belt loop. Cue Oh, Crap! from the bomber and an amused grin from Bond.
- In The Dark Knight, the Joker threatens to pull the pins on a jacket of grenades to escape the mobsters meeting with Lau.
- In Furious 7, Dom manages to pull a variant of this by hanging a bag of granades onto Jakande's chopper. It takes a shot by Hobbs from the gun to set them off tho.
- In the final battle in G.I. Joe: Retaliation, Firefly pulls out one of his special bombs to use on Roadblock, only to find that Roadblock is holding the detonator. Boom!
- A variation is used by the title character in the climax of Hellboy. When Hellboy sees that he is about to be eaten by the monster he grabs a grenade belt and yanks off all the pins. Possibly something of a subversion since Hellboy knew he would most likely survive the blast but he was going to be very sore tomorrow.
- I Am Number Four: Number Four kills the leader of the Magadorians by using his telekinesis to set off all of the leader's futuristic bullets while they're still strapped to his chest.
- Kingsman: The Secret Service: Happens in the opening scene when the prisoner presents the pin of a grenade in his mouth.
- Mr. & Mrs. Smith (2005): John does this accidentally during the freeway chase, going for the grenade but accidentally yanking the pin. He quickly gets away, the explosion taking out the mook and the car he was riding in.
- The accidental version happens in Once Before I Die, killing one of the American officers.
- The Professional: Leon defeats the main villain using the suicide version of this. After being mortally wounded, Leon hands the villain the pin that has been pulled from a grenade. The villain is puzzled for a second, then opens Leon's jacket to see about a dozen grenades strapped to him. The bad guy has just enough time for an Oh, Crap! before being blown to bits.
- Raising Arizona: Hi accidentally grabs the pin of one of the Badass Biker's grenades.
- In Sherlock Holmes: A Game of Shadows, Watson shoots a mook who just pulled the pin on a grenade. The wound isn't fatal, but it's disorienting enough that the mook can't find the primed grenade in the sack of identical grenades it fell into.
- Tank Girl: The title character does this to the Water and Power mook who captured her, blowing him to bits.
- The Thin Red Line: Woody Harrelson's character Sgt. Keck, after tremendous build-up, dies accidentally a horribly short way into the film when he pulls the pin instead of the grenade.
"I blew my butt off!"
- Loki pulls this trick on Kurse in Thor: The Dark World; detonating the grenade he is carrying on his belt.
- The Tournament: This is how Lai Lai kills Petrov during the fight in the church. She throws him over her shoulder into the pews. She then holds up her hand to show a grenade pin dangling from her finger. Petrov gets an Oh, Crap! look on his face and looks to his belt to see which grenade it is before he explodes.
- Tom Cruise's The War of the Worlds has the main character pull the pins of at least one while he was being sucked into one of the tripods. Since he spit them out when his cagemates pulled him back, it seems implied that he pulled them with his teeth.
- In X2: X-Men United, Magneto pulls the pins from a squad of soldiers all at once using his powers.
- Doc Sidhe: Doc does this while possessed by the spirit of the Warbringer; using magic to cause the grenades Blackletter's men are carrying to detonate while they are still wearing them.
- The short story Once More from the Top by A. Scott Glancy shows what happened when the marines were sent to clear out Innsmouth. A couple of soldiers have succeeded in driving back a shoggoth with flamethrowers only to be fired on by the townspeople. Realising the safety lever has been shot off a phosphorous grenade clipped to his webbing, and that when it goes off he'll also kill his friend as he's wearing a flamethrower tank full of jellied gasoline on his back, a soldier leaps into the river where the shoggoth has retreated to and blows them both up.
- Up Front, by Bill Mauldin, features the "swamp hunter":
He loves to go on patrol, all alone, with a rifle, a Luger, a knife, plenty of ammo, and half a dozen grenades hung to his belt by their safety rings, so he can pluck them and throw them like ripe tomatoes. The fact that hanging grenades by their rings is not a good way to live to a respectable old age doesn't bother him at all. In fact, he tells with great relish how one came loose while he was creeping around a German position, and how it exploded under his feet, kicking his legs up in the air but leaving him miraculously unscratched.
- In Almost Human, this is how Kennex finally brings down a Robotic Psychopath.
- In the Crusade pilot "War Zone" the away team investigating a crashed Drakh ship gets pinned down by a squad from the enemy crew. Dureena sneaks around back and trips a grenade on one of the Drakh soldiers' belts, ending the fight very quickly.
- The Prisoner (1967): In the episode "The Girl Who Was Death", Number 6 rigs a couple of German grenades, moving the explosives into the handles. When the villains hurl them, the heads end up in our heroes escape boat, while the villains are left listening to the ominous hiss from the handles before exploding.
- Star Trek: The Next Generation: In "Starship Mine", after a scuffle with Picard, a thief makes off with a container of explosive trilithium resin. It turns out Picard removed a stabilizer from the container during the scuffle. She doesn't get far.
- Walker, Texas Ranger: In "The Final Showdown Part 2", Chuck Norris does this to Big Bad. After a long fight, Chuck and his adversary fall out of a window and land on top of a car. After they both roll off the roof, Chuck reveals that he pulled the baddies grenade pin. As he runs off, the grenade explodes.
- A variant in 007: From Russia with Love. One of the trick shots possible with the Bond Focus mechanic is shooting a grenade off some poor schmuck's web gear, which causes it to explode.
- Call of Duty: Black Ops:
- During "S.O.G.", an NVA soldier pounces on Alex Mason. After the player struggles for a bit, Mason pulls the pin on one of Charlie's grenades and pushes him away.
- This foreshadows a moment at the end of "Payback": after Frank Woods stabs Lev Kravchenko, Krav pulls the pins on all of the grenades in his bandolier at once. Woods tackles him out the window and they explode off-camera.
- It's also a reference to Call of Duty 3, wherein the exact same thing happened between the player and a Nazi soldier.
- A variation on this trope is a valid way to stealthily initiate hostilities in the series. By reverse-pickpocketing explosives into a target's inventory, you blow them up; the obvious implication is that you pulled the pin beforehand. If they catch on, they even give an Oh, Crap! or Why Am I Ticking? reaction.
- A radio show in Fallout 3 identifies this technique as "the old Shady Sands Shuffle." Performing it increments the "Pants Exploded" statistic and the first one earns the "Psychotic Prankster" achievement.
- One of the ways to complete "I Put A Spell On You" for the Legion in Fallout: New Vegas is to pull the pin on Davey Crenshaw's grenade and later cite his pranking nature to convince Colonel Hsu that he planted the bomb on the NCR monorail.
- Fallout 4 introduces Super Mutant Suiciders, a version of the super mutant that rushes the player with a mini-nuke as a suicide bomber. The safest way to take them out is to snipe the bomb (preferably from long range and before they notice you), killing both them and anyone else in the vicinity.
- If you kill them without the mini nuke going off, you can actually loot it.
- This is one of the takedowns you can learn in Far Cry 3. Interestingly, the person you pull it on is already dead, as it is a follow-up to a stealth knife assassination. The "surprise" belongs to the group of his friends that his body gets kicked into.
- One of the animations for capturing an enemy tank in Mercenaries World In Flames has you pull a grenade just as one of the tank's crew pops out of the top hatch with a pistol. After a brief struggle, your character will pull back, at which point the tanker will try to shoot you only to realize that you swapped his gun for your grenade. You then shoot him in the chest, causing him to drop the grenade into the tank.
- Sniper Elite V2 lets you shoot grenades attached to enemies' web gear, detonating them. There's even an achievement for it, "Remote Detonation".
- In Uncharted 3: Drake's Deception game this is possible to do when engaging in melee. Just make sure you get away in time.
- In Vampire: The Masquerade Bloodlines "Nines" Rodriguez saves the PC from Sabbat goons by threatening them with a grenade. Given Nines is at a power level to curb stomp the 3 young Sabbat easily, you seem to be the only reason he needs to use such a card.
- A possible tactic in Velvet Assassin, although it's a Stealth-Based Game so it might be more trouble than it's worth.
- In XCOM 2, the Fuse psychic ability lets the Psi-Op detonate grenades or other explosives carried by an enemy or on their corpse.
- Possible in Watch_Dogs by hacking grenades that enemies are carrying to cause them to instantly detonate.
- In Family Guy, Stewie does this to Lois in the climactic fight scene of "Lois Kills Stewie". She manages to pull the belt off and throw it away in time.
- In GI Joe: Valor vs Venom, Snake Eyes pulls the pins on every grenade on Storm Shadow's bandolier to escape him. Storm Shadow survives by tossing the belt before it's too late.
- The Question does this to a Cadmus mercenary in the Justice League Unlimited episode "Fearful Symmetry", but he's nice enough to remove the grenade belt before pulling the pins so the guy has a chance to get clear of the blast.
- Skysurfer Strike Force gives us Grenader, a sentient, person-sized grenade complete with a giant pin. The heroes usually pull it out before he's ready to use it.
- Young Justice: In "Summit", Kid Flash pulls the pins on the smoke grenades being worn on the vests of three Light ninjas.
- U.S. Senator Max Cleland ended up being a real-life case of this when a grenade whose pin had fallen out shredded both his legs and one of his arms during the Vietnam War. It turned out that the grenade came from a squadmate who had straightened all of the pins on his grenades (a dangerous but common enough practice during the war, in order to facilitate pulling the pins out with one's teeth without needing to visit a dentist afterwards), but had failed to secure them with duct tape. Cleland and the hapless squaddie were disembarking from a helicopter, and the jolt of him jumping onto the ground was enough to jar the grenade loose.
- Charles Murray, a Scottish career soldier who signed on in the French Foreign Legion for the experience, related a story of the aftermath of a grueling training march in full kit with weapons load. After thirty kilometres' march, the Legion recruits established camp and one man got into a tent shared with seven other recruits, gratefully and heedlessly throwing off his pack and webbing. Unfortunately, the action of shucking his pack also tugged the pin out of a grenade insecurely attached to one of the straps... All eight were killed and shrapnel injured men in neighbouring tents.