A-90 is one of the hostile entities in Doors, the Roblox horror game built around escaping through a series of procedurally generated rooms. In The Rooms, a quieter subfloor reached from the main hotel, A-90 appears and forces the player to stop moving entirely, attacking if they keep going. Clips of that tense standoff and its abrupt jumpscare spread through Doors gameplay videos, shorts and edits, where the sound became shorthand for being caught. It remains popular because it instantly signals danger, panic and a mistake in a game many viewers already recognise.