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CLICK to sign up and run with Maddo and the rest of the world! Freestyle motocross legend Robbie Maddison has a friend named Chris Ackerman. In March 2003, Ackerman suffered a freestyle accident at Dumont Dunes that potentially could have taken his life. He sustained a broken wrist, dislocated shoulders, collapsed lungs, shattered pelvis, broken ribs and a C-2 spinal cord injury that left him a quadriplegic. Since then, Ackerman’s will to live has blown the mind of Maddison
