This is the story John told:

I have a friend who works with Fire and Rescue in Anchorage. Every year, he has to go down to the mud flats to rescue tourists who think it’s fun to hike on them. They don’t realize that Turnagain’s bore tide comes in so quickly, and sometimes, they get stuck in the mud. More than one pair of shoes has been left on the flats as people fled the coming tide. Still, in spite of numerous warning signs, it seems that many tourists are oblivious to the danger. Some are more oblivious than others.