ONE OPERATOR WHILE WAITING FOR THE CLEAR ALARM SHUT DOWN HIS TRUCK IN THE SAFE ZONE AFTER ALL IS CLEAR, HE TRIED TO START BUT WHOULDN'T CRANK, FELLOW EUCLID DRIVER RAISED BATTERY TOP STOOD ON BATTERY POST TO SEE IF IT WAS LOOSE, THE DRIVER TRIED TO START WHEN IT SPARKED AND THE BATTERY BLEW UP. THE DRIVER DID HAVE HIS EYE PROTECTION AND HARD HAT ON.