Bicycle Vs Falcon

 Peregrine falcons may be the fastest animal on the planet, capable of reaching speeds well over 200 mph, but in hunting pigeons and other slower flying birds, their dominance in the sky is rarely challenged. When pitted against one of the fastest men on two wheels in a race downhill, however, the extent of this falcon's aerial skills are put on full display.

http://www.treehugger.com/natural-sciences/watch-peregrine-falcon-chase-down-pro-mountain-biker-video.html