while this is of course very cool, I was always convinced that it also included a motor. The acceleration seems too abrupt for just a Cd advantage, and that was right around the time of the big motor in chassis scandals
He's riding a fixie (presumably it's a fixie race). On a downhill, your legs are slowing you down; presumably he would have gained some advantage just by taking his feet off the pedals, but this would give a bit more advantage.
