Dry ice

I just got back from visiting friends at MIT. As is our tradition, we deep fried sundry items, including ice cream. To keep the ice cream from melting while frying, we used dry ice to make it very cold. (Fortunately for us, there's a guy that sells dry ice out of a shed a few blocks from Harvard square.) Of course, we bought more than we needed, because playing with dry ice is so much fun: