[Photo]Pastrana Nitro Circus Live

In this May 29, 2011 photo, action sports star Travis Pastrana works on a new motorcycle stunt at the Nitro Circus practice grounds in Pala, Calif. After playing to big crowds Down Under, Pastrana unleashes his Nitro Circus Live on North America with a Saturday night show in Las Vegas.(AP Photo/Lenny Ignelzi)