EE WAS INSTALLING ROOF BOLTS IN THE 1ST NORTH PANEL. HE HAD JUST INSTALLED A BOLT & WAS LOWERINGTHE DRILL BOOM WHEN THE ROOF BOLT WRENCH DISLODGED FROM THE ROOF BOLT HEAD AND SPINNED AROUND TO STRIKE HIM ON THE FOREHEAD JUST ABOVE THE RIGHT EYEBROW CAUSING A LACERATION REQUIRING 6 SUTURESTO CLOSE. HE WAS TREATED & RELEASED FOR HIS NEXTREGULARLY SCHEDULED SHIFT.