INJURED STATED THAT HE WAS GETTING INTO THE CAB OF THE RETURN BOLTER ON #3 UNIT WHEN A PIECE OF ROCK FELL HITTING HIS LEFT ANKLE. INJURED CONTINUED WORKING FOR AN HOUR OR SO BUT THE PAIN CONTI NUED AND APPEARED TO HAVE SOME SWELLING. INJUREDWAS BROUGH OUTSIDE AND TAKEN TO THE HARRISBURG HOSPITAL WHER HE HAD X-RAY. NOTHING BROKE. INJURED HAS NOT RETURNED TO WORK.