For instance: A certain smarmy, know it all military survival dude was on a show where he was placed in the Appalachians (please pronounce it app-uh-latch-un) with a non military, hippy type survival dude. It was early autumn and they needed to traverse along, not across, a pretty well organized mountain range to their supposed rescue destination. This lunkhead was walking along a pretty nice ridgeline and pointed in exactly the right direction as far as I could tell when he decided to descend to the bottom of the valley. Given that creek bottoms in this area tend to be overgrown and/or rocky and/or with very steep sidehills most of the time, it is usually a good call when you have to make a lot of distance to stay on the ridgelines. Mistake #2. When he did guide them down he didn't wait to follow a finger ridge down into the rougher going. No he decided that it was best to scale down a 100' clift risking heaven knows what accidents.