The meme comes from WWE star John Cena and his entrance theme The Time Is Now, first released in 2005. The unexpected version took off in 2015 on Vine and YouTube, where normal clips were suddenly interrupted by Cena's music and announcement. It grew from a popular radio prank call format and endless remixes that placed the entrance over movie scenes, sports clips and everyday moments. The format survives because the setup needs no explanation and the payoff is instant, even for viewers who never watch wrestling.