Particular original works' sounds reappearing in something else, often due to being made by the same people. (Parodies, like the lightsaber activation sound being used for a pencil, don't count.) Not to be confused with Stock Sound Effects. If several other works use it to the point where it's only loosely identified with its original source (e.g., those of the Atari Pac-Man or the Godzilla Roar), it becomes a Stock Sound Effect. See also Doom Doors.