John Cena may be retired from professional wrestling, but his WWE career will forever stick with him due to one ongoing joke. It's come up while making Peacemaker and now, even during the press tour for his latest movie, Little Brother, which is available with a Netflix subscription. A number of fans like to pretend Cena is invisible and think they're oh so clever riffing on his classic line, "You can't see me." Now, Cena is sharing just how often he still hears the joke.