The monster under the bed is one of the oldest childhood fears, and it has become a reliable trope in prank videos, short horror skits and Halloween content. Clips like this circulate as generic spooky sound effects rather than coming from one film or meme, passed around for bedroom POVs, fake scare cams and reaction edits. Its staying power comes from instant recognition: almost everyone understands the joke within seconds. That makes it useful every October, but also year-round for creators who want quick, family-friendly suspense.