Place it at the very end of a scare sequence, after a danger alarm, then follow it with a FNAF jumpscare scream for a second hit before cutting to a quiet reaction shot.
About this sound
This roughly five-second clip is Catnap's attack scream from Poppy Playtime Chapter 3, mixing a swelling build with a raw distorted screech, a piercing musical hit and rushing sound. It feels sudden and unsettling, making listeners flinch before laughing nervously. In the game, the purple cat hunts the player around Playcare before this jumpscare ends the run.