WHILE OFF LOADING PALLETS FROM TRUCK, A PALLET ON ADJACENT STACK WAS HUNG UP ON PALLET STACK BEING REMOVED AND FELL OFF STACK AS OPERATOR PULLED AWAY FROM TRUCK. PALLET STRUCK OPERATOR ON RIGH T ARM ELBOW AREA. FORKLIFT WAS PARRALE TO TRUCK WHEN PALLET HIT FORKLIFT AND OPERATOR.