Ice is quickly added to a dry Pyrex bowl. Not Dry there is Calcium Carbide on the bottom, that is why you do it quickly. When the Ice melts the water reacts with the calcium carbide (place on the bottom) to produce acetylene gas and calcium hydroxide. The acetylene gas then explodes into flames when a match is place on top. It will continue to burn even as the ice melts because it keeps producing acetylene until the calcium carbide runs out.
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