EE WAS USING A CHIPPING HAMMER TO BREAK UP A MATERIAL PLUG (GYPSUM) IN THE CHUTE ABOVE THE VIBRATING FEEDER AT MILL SILO #4. WHEN THE FREED MATERIAL FLUSHED, IT PUSHED THE HAMMER INTO HIS CHIN , CAUSING A LACERATION. EE WENT TO ER FOR XRAY (NEGATIVE), BUTTERFLY BANDAGE AND TETANUS SHOT. HE THEN HAD AN ALLERGIC REACTION RESULTING IN CELLULITIS OF ARM FROM SHOT. HE LOST TIME BEGINNIN