Abstract: Employee #1 was part of a crew on a lay-up line for pallet assembly. Just prior to the accident, he had been reaching into the work area of the nail gun operator in a form of horseplay. The lead person on the line stopped work briefly and tried to correct Employee #1's behavior. A short time later, with a different coworker operating the nail gun, Employee #1 again reached into the work area around the nail gun. The coworker had already started the downward movement of the gun onto the wood, and, since he was bump-firing the gun, it discharged a nail into Employee #1's finger as the safety struck his hand. The resulting fracture became infected and Employee #1 was hospitalized the following day. Subsequent investigation revealed that not all means had been taken by the employer to require employees to work and act in a safe manner.