EE BELIEVED HE HAD LOCATED HYDRAULIC OIL LEAK. EE PLACED BARE HAND ON UNSUSPECTED LINE, PULLING IT AWAY FROM SUSPECTED LINE. EE ASKED OPERATOR TO PRESSURIZE SYSTEM IN ORDER TO POSITIVELY IDEN TIFY LEAK. UNFORTUNATELY, EE'S INDEX FINGER WAS PLACED PRECISELY ABOVE A PINHOLE LEAK. AT OVER 2,000 PSI, THE PINHOLE LEAK PIERCED EE'S FINGER & INSTANTLY FILLED IT W/HYDRAULIC FLUID.