ON 7/14/03 EE A SURFACE UTILITY WORKER RECEIVED 1ST & 2ND DEG BURNS TO 20% OF HIS BODY DURING ANINCIDENT INVOLVING HORSEPLAY. THE INJURY OCCURRED IN THE SURFACE SHOP AREA OF THE SOLAR SOURCES UNDERGROUND, MONROE CITY MINE. ON 7/14/03 AT 2:25 PM EE & ANOTHER EE WERE LOCATED IN THE SHOP TAKING A BREAK. INJ EE WAS SITTING ON WORKBENCH & OTHER EE WAS STANDING NEARBY WHEN 2 OTHER MINERS