EE WAS CARRYING A SHEET OF METAL GUARD DOWN AN INCLINED WALKWAY. THE BOTTOM PART OF THE WALKWAY WAS COVERED WITH FROST. AS THE EE STEPPED OFF OFTHE WALKWAY HIS FOOT SLIPPED & HE FELL. HE RIGHT SIDE OF HIS CHIN STRUCK THE SHEET METAL GUARD CAUSING A LACERATION UNDER HIS CHIN.