[videoembed size="full_width" alignment="center"][/videoembed] If you had shown me this video two days ago, I would have laughed you out of town. "That is ridiculous," I would have said, "I am laughing at these children pretending like this is an actual thing. Ooh la la, stack stack stack." Not anymore. John Kilduff has opened my eyes to the world. Cup-stacking is ...