UNHOOKING SCREENING PLANT FROM THE TRUCK/TRACTOR PULLING ON THE 5TH WHEEL PIN WHEN THE PIN LEVER UNHOOKED WITH A SUDDEN SNAP. HE LOST HIS GRIP & BALANCE FALLING TO THE GROUND ON HIS RIGHT SHOU LDER. HE DID NOT SEE THE DOCTOR UNTIL 12/27/02 WHEN THE DOCTOR CONFIRMED A ROTATOR CUFF TEAR. OPERATION CLOSED FOR SEASON.