Place it near the end of a boogie sequence, just before the reveal, then follow it with the FNAF 2 jumpscare scream and the shocked meme sound for the reaction shot.
About this sound
This 8.5-second clip takes a playful boogie sound and turns it into a scarier version, keeping the goofy idea intact while the mood flips. It feels funny at first, then unsettling, like a lighthearted moment that suddenly takes a creepy turn. That quick change from silly to spooky is what makes it work as a prank sound.