INJURED WAS ASSIGNED TO REMOVE GREASE OUT OF KILN BEARING GREASE PIT. EE WAS CLIMBING OUT OF THE GREASE OPT. HE STEPPED UP ONTO THE CEMENT AND AS HE THEN WAS BRINING HIS FOOT DOWN TO STEP ON TO THE FLOOR GRATING, HIS FOOT CAUGHT OR TWISTED ON THE PLATFORM. HIS RUBBER BOOTS HAD GREASE ON THE BOTTOM THEM.