If that happens, put your hands into your armpits to warm them, take a deep breath and centre youself. Panic will kill you. Matches (long burn ones) are sometimes better & faster than a firestriker. If you have damaged hands you can pin the strikerboard with your foot, grip the match with the heel of both hands ( or your teeth) and make fire. Its been done at least once to my certain knowledge by a chap who had bad frostbite to both hands.