John Rodney Mullen (born August 17, 1966 in Gainesville, Florida) is a professional freestyle skateboarder, and considered to be one of the most influential skaters in the history of the sport. He is credited with inventing many tricks, including the flat-ground Ollie (originally called the 'ollie pop'), the kickflip, the Heelflip, the 360 flip, and the Impossible.