Put this clip at the peak of a horror montage, after a calmer build-up segment and before the reaction shot. Pair it first with the fnaf jumpscare scream for a double scare, then follow with the danger alarm meme sound button to keep tension running into the next scene.
About this sound
This clip is the short jumpscare burst from Nightmare Joe, lasting about three and a half seconds of sudden screaming and noise. It gives listeners an instant jolt, turning a quiet moment tense and startling in a way horror fans recognise. It comes from Fazbear's Return 4, a fan-made entry in the Five Nights at Freddy's world.