My friend Herb was returning home after several months aboard a Navy submarine. His wife and a crowd of people anxiously awaited the arrival of the vessel at a San Diego dock. She was so excited that she parked their car near the edge of the dock in a no-parking zone. The sub finally appeared. But it came in too fast and slammed into the end of the wharf. Fortunately, no one was injured. Unfortunately, Herb and his wife had to explain to their insurance company that their car had been damaged by a runaway submarine.