EE WAS DISMOUNTING OFF THE BACK END OF SERVICE TRUCK. HE STEPPED OFF THE BED OF THE TRUCK ONTO THE BUMPER WITH HIS LEFT FOOT AND WAS IN THE PROCESS OF STEPPING DOWN AND TURNING, WHENHIS LEFT F OOT SLIPPED AND HE FELL APPROXIMATELY TWO TO THREE FEET TO THE GROUND. ON HIS WAY DOWN, HE HIT THE TRAILER HITCH ASSEMBLY, INFLICTING THE INJURY.