John Cena built his fame in WWE as a loud, charismatic wrestler and later as a film actor, and his voice and entrance style became easy meme material online. Short Cena clips spread across Vine, YouTube and soundboards in the 2010s, often used for unexpected entrance jokes. This rabadoo version strips away music and context, leaving only the shouted nonsense phrase, which is why creators reuse it as a standalone hype cue rather than as a reference to one specific match or promo.