THE EMPLOYEE WAS INSTALLING A 12' CABLE BOLT. THE WRENCH WAS IN THE CHUCK BUT NOT QUITE ON THE BOLT HEAD. WHEN HE SPUN THE WRENCH, THE WRENCH WENT SIDEWAYS AND FLEW OFF THE BOLT FROM THE CHUCK, STRIKING THE EMPLOYEE IN THE RIGHT SIDE OF HIS HEAD JUST ABOVE HIS RIGHT EYE. THE LACERATION REQUIRED 6 STITCHES AND HE RETURNED TO LIGHT DUTY HIS NEXT SCHEDULED SHIFT.