EMPLOYEE STATED THAT WHILE PULLING CURTAIN IN THE #4 ENTRY OF WEST 3 SECTION, HIS FOOT SLIPPED CAUSING A PAIN IN HIS LEFT KNEE. HE WAS DIAGNOSED WITH MENISCAL AND POSTMEDIAL TEARS TO HIS LEFT KNEE. HIS FLWD DID NOT OCCUR UNTIL 11/17/05 DUE TO SURGERY.