The sound comes from the Doors horror experience on Roblox, where the Dupe creates a fake numbered door that punishes players who ignore the real room number. Clips of players getting tricked helped the laugh spread through gaming edits and soundboards, often alongside other Roblox staples like the Roblox oof. Because the meaning is clear without context, a wrong door, a laugh, you were fooled, creators kept reusing it outside Doors for any obvious mistake, baited choice or prank reveal in a game.