EE WAS STANDING BESIDE JEEP, SUPERVISING POLE REPLACEMENT. THE MECHANIC HAD LOOSENED BOLTS AT BASE, BUT WAS UNABLE TO REMOVE POLE. THE MECHANIC THEN ATTEMPTED TO SPREAD CLAMP BY APPLYING DOWNW ARD PRESSURE ON POLE. WHEN PRESSURE APPLIED POLE BROKE 24 INCHES FROM BASE, POLE SPRUNG UPWARD AND AROUND STRIKING EE ON FOREHEAD ABOVE RIGHT EYE.