I'm an entity that can spawn at any time in The Rooms, but it appears most commonly starting from Room 90. After spawning, a knock sound will play and any other audios will be paused, with me showing my face in a random spot on a player's screen as an indication of an attack. After this brief indication, the screen will be blocked by red static and a stop sign, in which any kind of movement, including camera movement or entering a locker, will cause me to jumpscare a player and damage them for 90 health. After this, I will despawn and any other audios will be replayed. A-90 freezes all other entities while on screen, so players should always prioritize me over other entities.