Tony Hawk may very well be the greatest skateboarder of all time. At age 42, the legendary Hawk can still pull off a 900. For those who don't know, a "900" refers to a 900 degree aerial spin off of a skateboard ramp. This is one of the most insane skateboarding tricks, and Hawk is one of only four (in the world) who have ever pulled it off.
Watch the video below as Hawk performs in front of more than 25,000 spectators at the Plaza del Mar beach in Barcelona.
P.S. If you're inspired, here's a collection of HowTo's straight from the master himself.