 What action did Don consider for testing the water flow in Superior?
Radio messages stated simply that Superior had seceded from Earth. The state police converged on the former site of Superior from several directions. The train's schedule called for it to pass through but not stop at Superior at 11:58. A National Guard officer volunteered to take a jeep down into the pit, having found a spot that seemed navigable. One other radio message came from Superior, now airborne, on that first day. Don Cort had been dozing in what passed for the club car on the Buckeye Cannonball when the train braked to a stop. Don made his way up to the locomotive and found a bigger knot of people gathered in front of the cowcatcher.
 Taking a rowboat over the edge to see what would happen.
 Taking a rowboat over the edge to see what would happen.  Jumping into North Lake to see if there was an electrical current.  Swimming through the stream to see what would happen.  Throwing something into the stream and seeing if it would funnel back into Superior.