In January, motocross and supercross rider Trey Canard crashed during a supercross series at Los Angeles’ Dodger Stadium, fracturing three vertebrae and damaging tendons and ligaments around his spine in the process. Doctors inserted two rods and five screws into his spine and performed a bone graft on his pelvis. It was his fourth injury in nine months, and most people would have understandably hung up the towel afterward. But not Canard, and his new movie, “REvival 41,” documents his road to recovery. Watch a preview of the movie below, and check out the full-length feature on Jan. 3