A truck driver had just dumped dirt from his truck on a shoulder. A skid steer loader began moving the dirt from the shoulder to grade out the slope. The skid steer was backing up to the slope to get its second load of dirt when the truck driver's right arm was caught between the back of the skid steer and the back of the truck. The driver's radial artery and radial nerve were severed and the driver was hospitalized, undergoing surgery.