EE WAS REMOVING FIRE BRICK FROM THE KILN DURING PLANT OUTAGE WITH AN 8 GAUGE INDUSTRIAL GUN. THEBRICK HE WAS SHOOTING WAS 55FT. INTO THE KILN. APIECE OF BRICK OR FRAGMENT OF SOME KIND FLEW BAC K, WENT BETWEEN THE BARREL ON THE GUN AND THE SHIELD. THE FLYING OBJECT STRUCK THE EE'S SAFETYGLASSES BREAKING THE RIGHT LENSE. EE WAS SENT TO EMERGENCY ROOM TO BE CHECKED OUT.