EMPLOYEE WAS IN THE PROCESS OF HELPING ANCHOR A BELT TAIL PIECE. HE WAS STANDING ON THE TAIL PIECE HOLDING A JACK PIPE WHEN THE JACK PIPE SLIPPED. HE LOST HIS BALANCE AND FELL OFF THE BELT TAI L. HE TWISTED HIS RIGHT KNEE WHEN HE HIT THE GROUND. EMPLOYEE CONTINUED TO WORK UNTIL MARCH 9TH. FIRST DAY MISSED DUE TO INJURY 3-10-04. KNEE SPRAIN.