One of the entrants in the bed race lost a wheel near the starting line. Luckily, they had a pretty fit doctor type at that position to hold up the left front-end...for the entire block while running. I was impressed. Each bed had a team of five, 1 rider and 4 runners. No casualties were reported. Helmets for the riders are required. Apparently, last year they had a team jump the curb in their enthusiasm.