BMX rider Luke Madill, who is currently ranked fifth in the world, flies over a jump on a purpose built track in his back yard in Sydney's western suburbs March 25, 2008. Madill and his father Roger built the Olympic length BMX track, complete with an 8-metre-high (26 feet) start ramp, so he can prepare for the 2008 Olympic games on a course that resembles the track riders will compete on in Beijing. REUTERS/Tim Wimborne (AUSTRALIA)