EE WAS UNDERGROUND UNLOADING CINDER BLOCKS ON HIS KNEES (DUE TO COAL HEIGHT). HE TWISTED AROUND TO THROW A BLOCK AND FELT PAIN IN HIS LT. KNEE. HE CONTINUED WORKING UNTIL JAN.10, 2002 WHEN HE HAD SURGERY ON HIS KNEE. EE DIDN'T BEGIN MISSING WORK UNTIL THIS TIME.