While a bit of heckling and excitement makes for an interesting race the USA has seen a growing amount of rider abuse from fans. These guys were simply drinking their beers and ringing cowbells, but some fans got a little out of control. While the idea of hand ups seems to be a part of cross racing at the local level, it's actually against the UCI rules, and any rider that even accepts a handup can be disqualified. And some fans went way beyond offering dollar bills and beers to the racers, spraying beer and throwing other objects at the racers. Not cool...