Kevin O says “Directions on how to make fire with just an old soda can and a chocolate bar.. Truly the most amazing thing I have ever seen in my life. The short of it, chocolate is an abrasive, polishes convex bottom of can. The can acts a reflector, put tinder at focal point presto you have fire to roast hot dogs to. This trick is sure to amaze anyone when you’re out in the bush this summer”. More here. Quite handy!