In 1999, Tony Hawk's "900" trick put a fresh spin on skateboarding. Now the board, helmet and other gear he used to land it have sold big at auction. Hawk tells us how it all came together.

Forbes contributors publish independent expert analyses and insights. I'm based in Chicago and have written for ESPN and Rolling Stone. Skateboarding legend Tony Hawk participates in a skateboarding ...

FILE - Tony Hawk attends the X-Games, Sunday, July 23, 2023, at the Ventura County Fairgrounds in Ventura, Calif. (Photo by Richard Shotwell/Invision/AP, File) (Richard Shotwell, 2023 Invision) The ...