Freestyle motocross star Robbie Maddison took London by surprise last night as he performed a spectacular backflip over an open Tower Bridge in the British capital. The 27-year-old Australian took to the air at 2.55am and soared nearly one hundred feet over the Thames. London, 13 July 2009. The early hours of Monday morning saw Maddison become the first rider in history to take on Tower Bridge on a...