WHILE EMPLOYEE WAS DRIVING A WELDING TRUCK TO WORKSITE IN THE RAIN ON A MUDDY HAULAGE ROAD, HIS TRUCK SLID OFF THE ROAD AND HIT AN EMBANKMENT. AT THAT TIME A KOMATSU 785 ROCKTRUCK WAS FOLLOWING AND PUT ON HIS BRAKES, CAUSING HIM TO SLIDE INTO THE WELDING TRUCK WHOSE DRIVER BUMPED HIS HEAD.