Abstract: Employee #1 and a coworker were carrying an approximately 10 ft long, 300 to 400 lb piece of 12 inch plastic sewer pipe up a hill to a crane truck that was to remove it from the site. Both employees had the pipe propped on their right shoulders. Employee #1 was on the downhill end of the pipe when his coworker slipped on the icy, frozen ground and lost control of the pipe. As the pipe fell, Employee #1 attempted to hold onto it, but the pipe's weight caused it to jerk back and strike him on the right side of the head. Employee #1 sustained a mild concussion. Both employees were wearing head protection at the time of the accident.