THE EE WAS WATERBLATING A PUMP PART AT THE GATE 9 WASH PAD. THE EE RELEASED THE SURFACE CLEANING TOOL TRIGGERS TO RELIEVE AIR AND WATER PRESSURE TO FREE THE ROTATION OF THE LANCE. WHILE MANUAL LY ROTATING THE LANCE, THE EE S HAD MADE CONTACTWITH THE RESIDUAL WATER STREAM AT THE LANCE TIP CAUSING A MINOR LACERATION TO HIS LEFT INDEX FINGER.