Abstract: At approximately 2:00 p.m. on September 29, 2003, Employee #1 was framing walls at a school construction site that included several buildings. He was working on the first level of Building B and was using his own nail gun when he accidentally fired a 3 1/4 in. long nail into his lower right leg. Employee #1 suffered a puncture wound and was transported to Scripps Mercy Hospital, where he underwent surgery and was treated for three days. Subsequent investigation found that Employee #1 had removed the safety spring from the nail gun. He had been working for the employer for approximately one week before the accident.