 Why was Don unable to shower while on Superior?
Radio messages stated simply that Superior had seceded from Earth. A National Guard officer volunteered to take a jeep down into the pit, having found a spot that seemed navigable. Don Cort had been dozing in what passed for the club car on the Buckeye Cannonball when the train braked to a stop. Don hesitated, shrugged at the redhead, said, "Excuse me," and followed the conductor. Don made his way up to the locomotive and found a bigger knot of people gathered in front of the cowcatcher. Don saw two men who must have been the engineer and the fireman talking to an old bearded gentleman wearing a civil defense helmet, a topcoat and riding boots.
 He was unable to remove the briefcase in order to remove his clothing,
 He feared that someone would steal the briefcase if he left it unattended.  The water supply was lacking from the stream flowing out of Superior.  There was an electrical current flowing throughout the water in Superior.  He was unable to remove the briefcase in order to remove his clothing,