"Vintage film shows woman holding what? Filmmaker says he's 'stumped' by image he calls 1928 cell phone Shades of the flux capacitor. Millions of people have watched a video by a Belfast filmmaker who thinks he has discovered a "time traveler" walking and talking on a cell phone in behind-the-scenes footage of the 1928 opening of a Charlie Chaplin film. "I was kind of stumped by what I saw," George Clarke says in his YouTube video, "I kept winding it back … and I couldn't explain this. Nobody can give me an explanation as to what it is." The video:http://www.youtube.com/watch?feature=player_embedded&v=Y6a4T2tJaSU[Edit:...