Speaking for friction fire methods, I saw a new one (for me anyways) on one of those extended premium documentary channels last weekend where some aboriginal type was standing on a log with one end off the ground (lever point) and he had a rope or vine or some such wrapped around the elevated end and was drawing the ends back and forth like he was trying to saw through the log from the bottom. He was pretty aggressive about it, and in a short time it was belching serious smoke!! Looks to me like an easy way to get a fire going. I can imagine the friction level with the speed and tension he was putting on that line was pretty high. He didn't seem to be working all that hard either. I'm gonna have to give that a try. I know rope burns on the palm of my hand happen pretty durn quick.