John Cena is a WWE wrestler and actor whose entrance theme, My Time Is Now, was released in 2005. The unexpected Cena meme took off online in 2015, editing his shout and theme into unrelated clips so he burst in without warning. The joke spread through Vine and YouTube edits and stayed popular because the intro is instantly identifiable, much like other wrestling entrance cues such as Here Comes The Money. It remains a shorthand for a dramatic, unwanted or proudly overblown entrance in meme videos today.