BECAME REPORTABLE ON 1/24/06 (1ST DAY OFF). ON 12/15/05 EE WAS REMOVING A METAL PANEL FROM A STOPPING WHEN A PIECE OF COAL RIB FELL, STRIKING HIM ON HIS RIGHT ANKLE AND TWISTING HIS KNEE (MUSCLE TEAR - RIGHT KNEE). EE CONTINUED WORKING UNTIL 1/24/06.