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Anthony Frank Hawk, nicknamed Birdman, is an American former professional skateboarder, entrepreneur and the owner of the skateboard company Birdhouse. A pioneer of modern vertical skateboarding, Hawk completed the first documented "900" skateboarding trick in 1999. He also licensed a skateboarding video game series named after him, published by Activision that same year. Hawk retired from competing professionally in 2003 and is widely regarded as one of the greatest and most influential skateboarders of all time. Wikipedia