U.S. skateboarding legend Tony Hawk wrapped up a brief philanthropic tour of Cambodia by performing a series of increasingly difficult tricks in front of a cheering crowd of young fans at a skate park operated by local NGO Skateistan Cambodia in Phnom Penh Thursday. Although the hourlong “free skate” at Skateistan’s Chamkar Mon district headquarters was billed as an opportunity for Cambodian skateboarders to ride with Mr. Hawk, it quickly became an exhibition, as most of the star-struck attendees were content to watch the lanky Californian perform kick-flips, spins, hand-plants and ramp transfers with vigor belying his 45 years.