Mary-Kate Olsen -- Human Torch Mary-Kate Olsen Human Torch 3/29/2009 8:50 AM PT She only weighs 48 pounds, so it wouldn't take much for the highly flammable Mary-Kate Olsen to go up in smoke. Hence a bad idea to pump gas with a cell phone in hand. Share on Facebook Share on X See also Full House -- All Bills Mary-Kate Olsen Olsen Twins Paparazzi Photo