Instead of using dry ice, you can use another item. Get an easily available can of that compressed air that is used to blow out computer keyboards with. If you turn the can upside down, then press the nozzle, the freon or whatever it is will blow out as a freezing cold spray. I mean it will freeze human skin allmost like liquid nitrogen to the point of frostbite if you do it long enough...like over two seconds. a series of quick squirts can be used immediately on burns to remove the heat and if not done too long, will not harm the skin. Anyway, it's damned cold and should do just fine. Oh, keep it away from a candle flame or a welding torch or whatever. The gas and melting frost is combustable. But, so is fix a flat. Oh, yea, this method is also good for freezing chewing gum to the point where you can cleanly break it out of hair or clothing.
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