While airborne, the skateboarder makes two-and-a-half turns about their longitudinal axis, thereby facing down when coming down.
On June 27, 1999, Tony Hawk, one of the most successful vertical pro skateboarders in the world, landed the 900 at X Games V after ten failed attempts.
When he finally completed the trick, his arms windmilled and his hand barely grazed the ramp.
BMX rider Mat Hoffman was the first person to successfully land the 900 on film at a competition in Canada in 1989.
[42] Because the gear of snowboarders, skiers, and inline skaters is affixed to their feet, the 900 is not considered to be a difficult trick for professionals in those sports and is performed comparatively often.
1620-[43] and 1800-degree[44][45] spins have been landed on skis, a 1620 has been performed on a snowboard[46][47] as well as on inline skates,[48][49] and a 1080 on BMX[50][51] and on scooter.