Whenever a character is in immediate danger, they will rarely just be able to run away from said threat. Usually, a locked door or gate will get in their way. But not to worry, the character always has the right keys and just enough time to open the door before they are killed.
Except... Uh-oh! They just dropped the keys!
The Dangerous Key Fumble trope refers to the often-used cliche (particularly in horror movies) where a character will always drop their keys if they are in a life-or-death situation. It doesn't matter if a killer is right behind them, or if a pack of wild and hungry animals is mere seconds from tearing them apart, the character will always fumble with and drop their keys at a crucial moment, thus giving the threat some much-needed time to catch up with them (and in some cases, actually kill them).
This also happens often in car scenes too... If a character wants to escape from something in their car, they can never just put the key in the ignition and start the engine. First, they will drop the keys near the gas pedal and spend the next minute-or-so stumbling around to find them. (And then, of course, when they do get the keys in, the car won't start...but that's another trope.)
- In Titanic (1997), Rose and Jack are trapped in the lower decks of the ship by a metallic gate as it floods. One of the cabin crew tries to unlock it but manages to do and say the trope before apologetically fleeing. Cue Jack attempting to retrieve the gate key multiple times as the freezing cold water rises.
- In Halloween H20: Twenty Years Later, Molly and John are being chased by Michael Myers and surprisingly manage to get a fair distance away from him, before locking themselves in a small courtyard. Unfortunately, Molly drops the keys outside the courtyard and spends a few minutes trying to reach them, thus allowing Michael Myers to catch up to them, pick up the keys and unlock the courtyard gate with ease.
- Played with in Zombieland, when Columbus drop his keys by the car while being chased by a zombie, but is smart enough to circle around the car until he's able to reclaim the keys without getting killed. Then he realizes he left his car unlocked, so he didn't need to get them out to unlock it in the first place.
- In The Human Centipede, Lindsay deliberately drops the keys (for some reason) after locking herself in the doctor's bedroom. She then realizes what a dumb idea this was, when the doctor then appears at the window with an axe.
- Happens to the protagonist in Dogma when she is attacked by the minions and drops her car keys, which the minions promptly knock underneath the car.
- There is a suspenseful moment in 10 Cloverfield Lane when Michelle tries to escape the bunker with Howard's keys. She has to open three locks at the main gate which takes her long enough for Howard to catch up. She manages to escape at the last second but not for long.
- XX: In "Don't Fall", Jay drops the keys to the RV when he goes back to rescue Jess. He has to go back and attempt to retrieve them from under the broken window that Gretchen is lurking outside.
- In The Dark Tower novel The Waste Lands, Jake has to go through a Haunted House to reach a magical doorway that will take him to the others in Mid-World. Just as the house comes alive and tries to eat him, he drops the key that will let him open the portal and it falls through the floorboards.
- The Tommyknockers: After Gardener visits the shed, he realizes, just as the "Shed People" are returning, that he forget to put the padlock back on the door. As he runs out to put it back, he drops it and the key falls out.
- Doctor Who
- "Utopia" has the Doctor fumble with his keys for a second, giving the Master the time to deadlock the TARDIS-door, making it impossible for the Doctor to open.
- "Closing Time" featured a variation. The Doctor escaped out of a house from the attacking monster, but accidentally dropped his Sonic Screwdriver as the door closed behind him. This led him being locked outside as the monster confronted his friend Craig moments later.
- Buffy the Vampire Slayer. In "Passion" Angelus is waiting outside Buffy's home when her mother comes home, and starts putting on a psycho ex-boyfriend act to make her nervous. Joyce manages to both fumble her house keys and drop a bag of fruit she's carrying before Buffy intervenes.
- In "Dead Man's Party" Giles, after running over a zombie, drops his keys as he rushes over to check on his "victim." He doesn't realize they're missing until he tries to start the car under zombie attack, forcing him to demonstrate his impressive hotwiring skills.
- Discussed on Seinfeld: Jerry is going home with a Girl of the Week, and as she's unlocking her door, he asks if she ever pretends there's an axe murderer after her to see how fast she can do it.
- One One Life to Live, Luna has just realized that her friend Suede is not who he claims to be when he beats up the cop who pulled them over. She runs back to the car and fumbles with the keys several times, allowing him enough time to steal the unconscious cop's gun and point it at her.
- In the music video for They Might Be Giants "Bastard wants to hit me", the character has managed to slip away from the titular bastard, and get to his car. However, the bastard notices him, and is very angry that he left before he was finished talking to him. The man freaks out and drops his keys. He picks them up, but before he can open the door the bastard catches up to him and lays him out.
- The final verse to Nickelback's Animals has the singer frantically looking for the car keys after his girlfriend's dad catches them getting it on in the car.
- Deep Sleep Trilogy: The second game featurs in interesting variation, with a screw driver instead of a key. At some point you are stuck in the attic and Felicity is closing in on you. To get out, you have to quickly unscrew a metal plate so you can reach the button for opening the elevator. But when you start, you drop the screwdriver and quickly have to pick it up again.
- Girl Genius: Theo can't find the right key in time when he's trying to unlock a handcuffed Sleipnir from the support column she's chained to while something huge is running down the stairs that lead straight to where she is trapped. Luckily the giant mechanical monster is on their side.
- Foster's Home for Imaginary Friends: Frankie drops her key to the front door of the house into a mud puddle while being chased by an apparent crazed killer. And thanks to some earlier shenanigans (it's a long story) there are now dozens of other keys in the bottom of the same puddle when she tries to fish the right one out.