EMPLOYEE WENT TO SEE A DOCTOR ON 2-13-02 AND WAS PLACED ON RESTRICTED DUTY. EMPLOYEE WAS HOLDING HOSE, ASSITING ANOTHER EE, HOSING SAND FROM BETWEEN SCREW FLIGHTS. IT CAUSED PRESSURE TO RELEAS E FROM FLIGHTS WHICH SQUEEZED EE'S RIGHT KNEE BETWEEN TWO FLIGHTS AND CAUSED A CONTUSION.