Last year when we did the Ride to Conquer Cancer, we kept leapfrogging a guy who had a car tire strapped to his rear rack.

The story they told at the finish was, for every $100 that he raised, he pledged to add a kilo of weight to his bike. The per-rider fundraising goal was in the $2500-3000 range, so this was how he motivated his friends and colleagues to donate!