THE EE WAS ASSISTING OTHERS GETTING BELT OUT OF THE STORAGE UNIT TO MAKE A BELT SPLICE. HE WAS STRADDLE THE STORAGE UNIT RAIL AND TURNED TO GET OUT WHEN HE FELT SUDDEN PAIN IN HIS RIGHT KNEE. HIS KNEE STARTED SWELLING UP. ON 1-24-00 WAS HISSCHEDULED SHIFT TO RETURN TO WORK. HE BEGAN MISSING TIME ON THIS DAY.