EMPLOYEE WAS WORKING IN KILN #2 CLEANING OUT STONE AND ASH. HE WA SPULLING A RAKE THROUGHOUT THE DAY. HE FELT OKAY AT 2:30 PM WHEN HIS SHIFT ENDED. FRIDAY MORNING WHEN HE AWOKE, HIS RIGHT SIDE , LOWER BACK MID SECTION AND RIGHT SHOULDER WEREVERY SORE AND STIFF.