I got this little bit of info from the Discovery Channel website. It appears that Seth Enslow is not dead as pplasm states, although I was able to find internet rumors to that effect.
":: SEPT. 20, 2006 PREMIERES ::
MOTORCYCLE VS. AIRPLANE
Seth Enslow is known worldwide as the biggest, baddest motocross jumper around. He's fearless and a little bit crazy. In this never-before-attempted stunt, Seth will test his limits and abilities at the Mojave Airport "boneyard," a desert rest home for vintage airplanes. Seth will endeavor to jump a classic 880 Convair, the only one of its kind in the United States. But he won't be jumping wing to wing; Seth will try to jump from the plane's tail to its nose. The tail stretches over 30 feet high and to make it over, Seth will be jumping on one of the largest takeoff ramps in the world. He'll have to launch at about 70 miles per hour and fly close to 200 feet from takeoff to landing.
Premiere: Sept. 20, 2006 "