At times, success can be bittersweet when you finally reach the top only to find someone trying to knock you down. What to do? Keep going, says skateboard icon Tony Hawk.

In this 'Trep Talk Extra, Hawk shares how he handled the backlash of criticism following his rise to success as an entrepreneur in the skateboard industry. 

Tony Hawk's adventure sports empire includes skateboard company Birdhouse Projects, the Hawk Clothing line, a wildly popular video game series, and his production company 900 Films that teamed with YouTube this year to launch the Ride Channel. He has also donated more than $4 million to nearly 500 skatepark projects throughout the country through the Tony Hawk Foundation.

Related: Tony Hawk on Building a Brand Around Doing Your Own Thing