The sound comes from the entrance of The Undertaker, the WWE character played by Mark Calaway who debuted at Survivor Series in 1990. His Deadman persona walks to the ring in darkness as a funeral bell tolls, building the Rest in Peace image that defined his career. Clips of the gong spread through wrestling forums, YouTube edits and soundboards as a shorthand for an ominous arrival. It is still paired with other dramatic stingers like dun dun dunnnnnnnn in memes.