Place this clip at the exact frame a character turns, then follow it with the FNAF jumpscare scream if the scene escalates, or precede it with a danger alarm sound effect meme sting to build the fake scare first.
About this sound
This is a brief distorted laugh voiced for Sonic.EXE, lasting under two seconds and delivered as a sharp vocal burst. It feels mocking, threatening and darkly funny, like a villain taunting you mid-fight. The clip comes from the Friday Night Funkin' fan-mod scene around the creepypasta version of Sonic.