I promise this is not how I ride my bike. Cycle into the poor defencless target at speed and choose the angle and power you want to punt him with, using the mouse, then watch as he flies over by-standers. Different characters affect him differently when he hits them- slowing him down, dropping dead, kicking him on for further punishment etc. After five goes my best so far is 681.45 metres.
thanks to Penny for the link.