INJURED WAS WALKING THROUGH THE PLANT AT A HURRIED PACE. THE FLOOR WAS WET FROM EITHER WASHING DOWN OR FROM A RAIN STORM. AS HE STEPPED ON AN INSULATING MAT(BELT) HIS LEFT FOOT SLIPPED OUT FRO M UNDER HIM CAUSING HIM TO FALL. AS HE FELL, HE TRIED TO CATCH HIMSELF WITH IS LEFT ARM CAUSING HIM TO STRAIN LEFT ARM AND SHOULDER.