John Rodney Mullen is an American professional skateboarder, entrepreneur, inventor, and public speaker who practices freestyle and street skateboarding. He is widely considered the most influential street skater in the history of the sport, being credited for inventing numerous tricks, including the flatground ollie, kickflip, heelflip, impossible, and 360-flip. As a result, he has been called the "Father of Street Skateboarding."