Place this clip at the exact reveal frame, after a quiet build from a danger alarm meme sound, then follow it with the FNAF jumpscare scream for a second hit if the scene needs a layered scare in a longer edit.
About this sound
This clip is the Nightmare jumpscare from Five Nights at Freddy's 4, an 11-second burst of loud mechanical screeching and distorted roaring. It feels abrasive and panicked, built to startle listeners instantly and leave them tense and nervously alert. It comes from the 2015 horror game known for its aggressive animatronic attacks.