Place this clip right before the chase beat in your edit, then follow it immediately with a FNAF jumpscare scream for the reveal and an enemy spotted callout when the pursuit starts moving across the screen.
About this sound
The clip is a short spoken voice line delivering the phrase I'm right behind you with a close, unsettling delivery meant to sound like someone standing just out of sight. It gives listeners a tense, startled feeling, mixing jump scare nerves with dark humour because the warning arrives at the exact moment it is already too late to react.