EE WAS OPERATING A SHUTTLE CAR IN HIGH TRAM IN THE E18 SECTION L-1 ENTRY. WHILE TRAMMING SHUTTLE CAR, CAR HIT HOLE IN RUNWAY, CAUSING EE'S TAIL BONE AREA TO BE SLAMMED AGAINST THE OPERATORS SE AT. *EE RETURNED TO HIS REGULAR JOB FROM 1/7/00 THRU 3/15/00. *FIRST DAY OFF 3/16/00.*