EMPLOYEE WAS RUNNING OVER A TRUCK. HE HAD TAKEN A TRAILER TO BE LOADED TO THE SHIPPING DOCK WHEN HE WENT TO UNHOOK HIS AIRLINE, HE PUT HIS LEFT HAND ON THE TRAILER AND HIS RIGHT ON THE AIRLINE . THERE WAS ICE ON THE FRONT OF THE TRAILER AND IT CAUSED HIM TO LOSE HOLD AND FALL OFF THE TRUCK ONTO THE GROUND, HITTING THE STEP WITH HIS RIGHT HAND AND ELBOW.