WHILE OPERATING A SMALL CASE LOADER, EE DUG INTOA PILE AND HIT AN OBSTRUCTION. SEVERAL DAYS LATER HE WAS SWINGING A SLEDGE HAMMER REPEATEDLY. ON2/17 HE COULDN'T WALK AND WENT TO EMERGENCY ROOM ON 2/20 HE WENT TO COMPANY DOCTOR & REMAINS OFF WORK WITH MUSCLE SPASMS.