Not to sound rude but really you have been watching too much Survivor and seen Castaway too many times, your not going to suddenly know how to make rope out of vine or some other usefull skils if you have never praticed them before. What if your in an accident like a plane crash and can't make your grass whistle what are you going to do when the rescue choppers are flying over head and can't hear anything because you can make enough noise. What if your arm is broken and you can't weave rope, what are you going to do?? What if you can't keep a fire lit because your in a downpour of rain and you run out of matches, you need fire fast and can't get a natural way to work, what do you do? By the way rubber bands wear out some what easily so it would be my first choice for a tourniquet. <br>Not to sound rude or anything but you should read up on skills and pratice them before relying on them in an emergency.<br>Tom Brown writes some really good books on wilderness survival and tracking. (www.trackerschool.com)<br>Hope this was helpful.<br><br><br> Frank