If you are in the wild and have nothing to do, just to play around with your knife , then you should surely watch this video. First, you have to find a knife. After that you must find a good branch or piece of wood that's the same size as a spear. After that you must take the branch or piece of wood and sharpen one of the ends. Then , you must put the sharpened end in the fire so it begins to turn black. After that cut it again and this time cut it so it will be sharp enough to cut. It can serve also as a walking stick , not just a ordinary battle spear.