EE WAS GRASPING AIR LANCE & USING IT TO KNOCK MATERIAL BUILDUP LOOSE FROM CHUTES ON PREHEAT TOWER.HE HELD THE END OF THE LANCE WHERE THE AIR CONTROL VALVE WAS & HAD THE HANDLELESS VALVE STEM B NETWEEN HIS MIDDLE AND RING FINGER. THE LANCE REBOUNDED WHEN HE STRUCK THE WALL ON THE OPPOSITE SIDE OF THE CHUTE AND THE VALVE STEM STRUCK THE SIDE OF HIS FINGER CAUSING A SPRAIN. RESTRICTED