There is 17 years, Tony Hawk was the first to have successfully completed a 900 in skateboard. The Monday, June 27, 2016 at the age of 48, he retried experience. After several failed attempts and some falls, Tony Hawk more determined than ever succeed his 900 in the half-pipe. He explained that this is definitely the last time he performs such a figure. A 900 is a figure who consist to turning on yourself, the 900 is the number of degrees of the angle, two and a half laps.