Two employees were traveling between buildings in a golf cart. Road conditions were wet and slippery from recent rainfall. The golf cart was traveling downhill, and the driver slammed on the brakes to stop the cart. The golf cart overturned, throwing the injured employee out. The cart landed partially on the employee, fracturing his left arm and injuring his shoulder. He was hospitalized for treatment. The injured employee was not wearing a seatbelt at the time.