- ABCs of Death 2: The badger in "B is for Badger". In Real Life, badgers can be dangerous, but not that dangerous. They are certainly not capable of ripping a grown man in half.
- Early in Barbarella, the title character is similarly menaced by a group of dolls whose mouths show very pointy teeth. Later in the movie, she is nearly killed by vicious killer budgies (parakeets).
- The Vampire Pomeranian in Blade: Trinity named Pac-Man. It appears to have the split-mouth of a Reaper.Hannibal King: You made a goddamn vampire... Pomeranian?!?
- Bullitt: The mob hitman is a grey-haired man in plain clothes. His driver looks like a middle-aged accountant, but Bullitt has to work hard to keep up with him in the car chase.
- The gopher in Caddyshack.
- Captain Marvel: The sweet, innocent kitty Goose is later revealed to be a Flerken, an extremely dangerous creature with a Pocket Dimension full of Combat Tentacles in her mouth. It's also the real reason Nick Fury only has one eye now.
- Cats & Dogs has the antagonist Mr. Tinkles — the cute cat who's also a Diabolical Mastermind.
- Chucky from the original Child's Play films (before his Frankenstein makeover).
- The Dark Crystal:
- Fizzgig looks a cute furball until he opens his wide mouth and reveals four rows of serrated teeth.
- Furthermore, the animals in the Skeksis' laboratory use their combined cute fluffiness to escape and savagely maul the Scientist down into the furnace, saving Kira.
- In Dr. Jekyll and Mr. Hyde (1973), Jekyll tests his formula on a rabbit, which makes it aggressive enough to chew up his cane.
- Given a Lampshade Hanging in Galaxy Quest: while the rest of the crew is Squeeing about how adorable the child-like alien miners are, the very Genre Savvy Guy worries, "Oh, sure, they're cute now. But in a second they're going to get mean. And they're going to get ugly somehow. And there's going to be a million more of them." Moments later, he's proven right.
- The Mogwai in Gremlins, except the original Gizmo; fluffy and adorable, they are cruel tricksters who eventually turn into hideous (yet still somewhat cute) monsters which go on a deadly rampage. Indeed, every imaginable variant on this trope seems to run through most, if not all, Gremlin folklore.
- The Gillymuck: The titular creature looks like a stuffed E.T. doll, and becomes VICIOUS when mocked. Just ask the three mean girls.
- Played with in Gozu. You'll never know if the cute Chihuahua in fact was a trained Yakuza attack dog.
- Sam in Happy Accidents is terrified of tiny dogs.
- Jurassic Park:
- Dennis Nedry in Jurassic Park (1993) gets killed by a fairly harmless-looking Dilophosaurus... after it spits poison in his face, then ambushes him when he tries to get back to his truck. It should be noted that the real Dilophosaurus probably couldn't do that. Then again, we really have no way of knowing, but they certainly did not have those nifty-looking frills. Also, the real Dilophosaurus was much bigger than the one in the movie.
- Furthermore, there are small, harmless-near-cute-looking Procompsognathus/Compsognathus in The Lost World: Jurassic Park, whose packs are enough to turn a healthy adult male into..."Did you find him?"
"...Just the parts they didn't like." - The baby Pteranodons in Jurassic Park III, which attack in swarms and have sharp vicious beaks.
- The Dimorphodons in Jurassic World, though they're not exactly cute or cuddly looking before they start mauling people.
- The Stygimoloch in Jurassic World: Fallen Kingdom looks arguably adorable, even when attempting to ram her way through Owen and later doing the same to several others after she's set loose.
- The Lystrosaurus and the Moros in Jurassic World Dominion. The first being a tiny herbivore doesn't mean it won't bite, especially not when it's armed with a pair of sharp fang-like tusks. While the second is a tiny feathered relative of Tyrannosaurus rex, it certainly looks like a Goofy Feathered Dinosaur, it's also shown to be more than capable of taking down small prey. In the film, it is shown killing a mouse with ease.
- The title character in the Leprechaun series.
- A whole colony in The Lone Ranger. It's rather creepy too.
- In Mom and Dad Save the World, Dick Nelson encounters a group of cute mushroom-like creatures which appear to be friendly... until he tries to pet one. It opens a huge mouth with sharklike teeth and almost takes off his hand.
- Monty Python and the Holy Grail is the Trope Namer
- The Rabbit of Caerbannog. Ironically, Arthur and his knights are warned repeatedly by Tim the Enchanter about the power of the rabbit. They don't listen, and he laments how no-one listens to him because "it's just a harmless little bunny!" After being Instantly Proven Wrong in thinking they can take it on as a group, with a few more knights killed in the process, they resort to using a Holy Hand Grenade to finally slay the beast."Look at the bones!"
- An implied example in the same movie would be the Vicious Chicken of Bristol which Sir Robin nearly stood up to, though given that it's Sir Robin, the Chicken might be a case of Deathbringer the Adorable (though he's never shown cowering and running away from anything harmless-looking in the movie).
- The Rabbit of Caerbannog. Ironically, Arthur and his knights are warned repeatedly by Tim the Enchanter about the power of the rabbit. They don't listen, and he laments how no-one listens to him because "it's just a harmless little bunny!" After being Instantly Proven Wrong in thinking they can take it on as a group, with a few more knights killed in the process, they resort to using a Holy Hand Grenade to finally slay the beast.
- Night of the Lepus, a movie about Giant Killer Bunny Rabbits. It's intended as a horror film. Meat-eating rabbits that hunt and kill horses at one point. Three scientists grab the Idiot Ball hard to make it happen.
- Let's not forget Screamers with the Deliberately Cute Child Killer Robot. "Can I come with you?"
- On the good ship Serenity, who's the most dangerous crewman? Is it the wily and wary captain Malcolm Reynolds? The calm, stoic, and deadly first mate Zoe? The giant, burly Jayne with enough weapons to outfit a revolution? Nope. Look behind them. Not at the pilot, or the preacher, though they're deadly enough in their own right. Not at the mechanic, and not the doctor or the Companion. Yeah, There. That teenage girl in the back, with the unwashed hair, pale skin, glazed and distracted eyes, who's mumbling something about hummingbirds? Her name is River. Get on her bad side, and she will fucking end you.
- Star Wars:
- Ewoks. Yes, they're cute. Yes, they're fuzzy and huggable and all that. Yes, they're adorable miniature bears. Think about that one. Miniature bears! With astonishing engineering skill for a neolithic materials base, extensive knowledge of sophisticated warfare, and a willingness to kill and eat other sapient beings. Think of them as armed, sapient, and highly sophisticated sociopathic bipedal giant koalas who regard you as potential food, and you'll start to understand exactly why the Ewoks qualify for this trope. Still don't believe us? Go read Apocalypse Endor (Star Wars Tales 14). That's right — Endor is The Empire's 'Nam.
- Yoda is the cute little floppy-eared goblin that talks funny. Even Luke and R2-D2 thought he was harmless when they met him. In actuality, he is a badass Jedi that can pull a triple backflip and chop off your head before you blink. He's undoubtedly one of the strongest and most skilled Jedi in the history of the galaxy too - almost an even match for Darth Sidious, one of the deadliest Dark Siders ever.
- In The Last Jedi, he is able to summon a giant bolt of lightning from the skies... as a Force Ghost!
- This Spanish student film
uses this trope quite deliberately with its genetically altered Death Rabbit. - The Suicide Squad. While infiltrating Jotunheim, King Shark is distracted by an aquarium filled with colourful octopus-like creatures who follow his movements and copy his outline. King Shark is overjoyed by his new friends, but when an explosion breaks the aquarium and frees the creatures, they reveal rings of ridiculously sharp teeth on their undersides and swarm over King Shark like piranhas, almost killing him.
