Place this clip right before the scare hits in your edit, then follow it with the fnaf jumpscare scream for the payoff. For a fake-out, pair it instead with the roblox oof after a character trips or gets caught.
About this sound
This clip is a single heavy footstep from the Figure, the blind monster that stalks players by sound in Doors, lasting just over a second. It lands with a deep, thudding weight that feels tense and threatening, like something huge is walking right past you in the dark and could turn toward you at any second if you make a noise.