Place it at the reveal point of a locked-door gag, after the setup and before the reaction. Put a game show buzzer just before it to sell the failed attempt, then follow it with a bruh sound once the door is open and everyone realises what happened.
Über diesen Sound
This is a very short clip centered on a door opening without a key, built around a single quick unlock action that lasts well under a second. It feels cheeky and a little sneaky, like catching someone somewhere they were not expected to be, with a small jolt of surprise as the door gives way.