The Undertaker is the long running WWE persona of Mark Calaway, debuting in 1990 as the Deadman, an undead mortician character known for his slow entrance in darkness. His theme, built around a funeral bell toll, became one of wrestling's most recognisable intros during his decades long career and WrestleMania streak. Online, the toll escaped wrestling and became shorthand on YouTube, TikTok and soundboards for death, doom or an unstoppable arrival, often paired with lights out edits.