High school science teacher "Mr. Kent" has a YouTube channel full of neat chemistry demonstration videos. In this one, he sets ice on fire. Here's how:
Ice is added to a dry Pyrex bowl. 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.
via Urlesque | Mr. Kent's Chemistry Page | YouTube Channel