WHILE GOING THROUGH A TEMPORARY CURTAIN, EMPLOYEE STEPPED ON A PIECE OF POLYSLICK AND FELL ONTO A PARTIALLY TORN DOWN BLOCK WALL. (EMPLOYEE DID NOT GO TO THE DOCTOR UNTIL 8/9/05 AND WAS DIAGNOSED WITH THE FRACTURE AT THAT TIME.) ***REPORTED ONLY DUE TO FRACTURE TO THE RIB NO TIME LOST***