EE STEPPED ON GRATING AT MONITOR CLAMSHELL AREA. THE GRATING SLIPPED OFF ONE EDGE, CAUSING HIM TO FALL WITH IT INTO THE DITCH. HE FELL ONTO A CORNER OF THE STEEL GRATING, WHICH LACERATED THE B ACK OF HIS LEFT INNER THIGH. HE CLIMBED OUT OF THE DITCH. FIRST AID WAS APPLIED, AND AN AMBULANCE WAS SUMMONED. ER DR.'S CARE-RELEASED 1.5 HOURS LATER.