John Cena is a WWE wrestler whose entrance theme and announcement became a viral meme in the 2010s, after clips of his surprise appearances were shared widely on YouTube and social media. The format spread because the build-up and reveal could be edited over almost any entrance, from pets and friends to fictional characters, turning a wrestling catchphrase into a universal punchline for unexpected arrivals. It remains popular because the John Cena entrance is instantly recognisable even to viewers who do not follow wrestling.