Place it near the end of a bedroom prank edit, just as the camera moves toward the bed, then follow it with a shocked gasp and a jumpscare scream for the payoff. If the victim runs off, add the running line next to close the scene.
About this sound
This clip is a quiet, menacing voice saying it is hiding under your bed, delivered as a single short line meant to unsettle whoever hears it. The hushed delivery makes it feel creepy and tense, like someone is waiting in the dark just out of sight. It works best as a sudden scare, turning an ordinary bedroom moment into a joke that lands because the threat sounds close and personal.