Book excerpt: With dirt flying, engines screaming, and fans roaring, supercross races are unlike any other sport. Riders sail over dirt jumps, slide around hairpin turns, and power their way to the front of the pack. Held indoors, this, fan-friendly, high-energy version of motocross racing has swept the nation. In this book you will learn about the earliest supercross races, including the famous 1972 Superbowl of Motocross. Plus, see how crews build and tear down a supercross track in less than a week's time and learn about the stars of this amazing sport, from early greats such as Bob Hurricane Hannah to James Stewart.