A mountain bike racer jumps his bike as spectators watch .
There is a better than even chance that a mountain bike racer jumps his bike in a competition in front of spectators .
There is a better than even chance that a mountain bike racer jumps his bike in a competition in front of spectators .
There is little chance that a mountain bike racer jumps his bike in a competition in front of spectators .
A mountain bike racer jumps his bike in a competition in front of spectators .