A HUNG STAGELOADER CHAIN FLIGHT WAS BEING REMOVED BY CUTTING INTO THE FLIGHT WITH A CUTTING TORCH. WHEN THE FLIGHT WAS CUT INTO A PIECE STRUCK INJURED ON THE LEFT BACK SIDE ON HIS HEAD. INJURED WAS APPARENTLY UNCONSCIOUS FOR APPROX 2 MINUTES. INJURED WAS TRANSPORTED TO HOPSITAL AND RELEASED SAME NIGHT WITH NO INJURIES.