EMPLOYEE WAS CLEANING UNDER SCALES USING POWER WASHER. LAID DOWN WAND TO USE SHOVEL AND PICKED UP WAND ON POWER WASHER WITH RIGHT HAND. FINGERS HIT TRIGGER CAUSING WAND TO GO OUT OF CONTROL. TRIED TO GRAB WAND WITH LEFT HAND AND SPRAY FROM WAND HIT LEFT HAND INDEX FINGER CAUSING CUT AND FRACTURE OF INDEX FINGER.