Red Bull has employed the daring of freestyle motorcross champion Robbie Maddison in the latest stunt to promote its international X Fighters event. Maddison took to Tower Bridge at 2.55am on Monday for a death-defying leap, soaring 100ft over the Thames with a no-handed backflip along the way. The X Fighters event comes to London's Battersea Power Sation on 22 August.