EE HAD BEEN PULLING BAGS ON #2 CEMENT PACKING MACHINE A BAG GOT TWISTED ON THE 2ND BELT CONVEYOR & CAUSED A JAM UP. WHEN THE EE LIFTED THE JAMMED BAGS TO CLEAR THE BELT CONVEYOR HE FELT A TUGGING INSIDE HIS LOWER ABDOMEN. ACCIDENT WASNOT REPORTED UNTIL 4/18/01 LOST TIME ON 4/20/01