James "Bubba" Stewart is one of the fastest men in Supercross motorcycle racing. He has dominated dirt tracks ever since he was in elementary school. But James didn't become a great racer overnight. He practiced every day in his own backyard, from age 3 on. Through this experience, he developed the skills that helped him win the World Supercross title in his first full season of competition in 2006. His courage, strength, and skill make him almost impossible to beat.