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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."

From Wikipedia, the free encyclopedia. Ryan Allen Sheckler (born December 30, 1989) is an American professional skateboarder and the star of the MTV reality show, Life of Ryan. Description above from the Wikipedia article Ryan Sheckler, licensed under CC-BY-SA, full list of contributors on Wikipedia.​

Anthony Frank "Tony" Hawk (born May 12, 1968) is an American professional skateboarder. Hawk gained significant fame for completing the first 900 as well as his licensed video game titles distributed by Activision. He is widely considered one of the most successful and influential pioneers of modern vertical skateboarding. Raised in San Diego, California, Hawk was described as being "hyperactive" as a child. His parents supported his skateboarding because it served as an outlet for his excessive energy, and as Hawk's skills developed, he became a professional skateboarder at age fourteen. In 1999, he became the first skater to land a 900. In 2002, he created the Boom Boom HuckJam, an extreme sports exhibition and tour which launched in Las Vegas. Throughout his career, Hawk has made numerous appearances in films and other media, as well as his own series of video games. He has also been involved in various philanthropic activities including his own Tony Hawk Foundation which helps build skateparks in underprivileged areas, and also including collaborations with other athletes in the charity Athletes for Hope. Description above from the Wikipedia article Tony Hawk, licensed under CC-BY-SA, full list of contributors on Wikipedia.