Gold medalist Jaroslav Kulhavy, of the Czech Republic, Cyclists compete in the Mountain Bike Cycling men's race, at the 2012 Summer Olympics, Sunday, Aug. 12, 2012, at Hadleigh Farm, in Essex, England. (AP Photo/Matt Rourke)

Jaroslav Kulhavy of the Czech Republic is gearing up to defend his Olympic gold medal in the men's mountain bike race on Sunday.

First he has to avoid bumping into car doors. 

Sounds like he'll be just fine for the race. Watch out for that Rio de Janiero traffic, though.