John Cena is a long-running WWE superstar whose entrance music became instantly recognisable to wrestling fans around the world. Online, the theme took on a second life as a surprise meme, where the music suddenly interrupts an unrelated clip just as Cena appears or is named, turning an ordinary scene into a joke about an unexpected arrival. That format spread widely across YouTube, TikTok and short-form edits, and the short intro remains popular because listeners recognise it immediately, even without seeing the wrestler.