A mountain bike racer jumps his bike as spectators watch .
There is a better than even chance that a bike racer is trying to hype up the crowd for the show .
There is a better than even chance that a bike racer is trying to hype up the crowd for the show .
It is improbable that a bike racer is trying to hype up the crowd for the show .
A bike racer is trying to hype up the crowd for the show .