UI failure: where GPS can steer you wrong

Here's an example of GPS (navigation system) turning sour: "Navigation nightmare on a desert road". The driver used GPS before and seemed reliable but when real help was needed out in the desert, GPS guided the driver to a dangerous location during a thunderstorm and one of the tires blew out on the backroads! You trust the system a little bit and when the rubber meets the road it can severely go wrong. Ouch.