Abstract: Employee #1 was driving an International Harvester wheel-type agricultural tractor, model I-484-D, down a steep hillside. The tractor began to slip on wet grass and picked up speed. Employee #1 apparently did not shift out of low gear because the rear wheels started to bounce about two-thirds of the way down the hill. The tractor hit a small gully and the front end left the ground. When it came down, the tractor was sideways and started to slide down the hill and roll over. Employee #1 either jumped or was thrown from the tractor. The rear wheel landed on Employee #1's head, killing him. The tractor's brakes functioned properly but a rollover protective structure was not provided.