EE WAS TRYING TO REMOVE A BOLT FROM AN AIRCOMPRESSOR. DIFFICULT LOCATION AND TIGHT QUARTERS RESULTED IN AN OVEREXERTION AND STRAIN SITUATION. WHILE OVEREXTENDING AND PULLING TOWARDS THE EE BOD Y HE FELT SOMETHING IN HIS CHEST POP. LATER ON THE WAY TO THE HOME HE DECIDED TO STOP AT THE HOSPITAL AND HAVE AN X-RAY. IT WAS DETERMINED HE HAD BROKEN A RIB.