Check to have links open new windows.

First, this, from Yahoo News, about people in Italy making a big deal over making ice cream with liquid nitrogen. They say they're going after a patent, but the kind of folks I hang around with have done this for a while. But the best thing about the article is the accompanying photo:

With the caption, and I am not making this up, "Nitrogen Symbol Photo".

Meanwhile, some enterprising folks at the University of Arizona apparently absconded with a cylinder of liquid nitrogen and made what the article says was a "dry ice bomb", but which I bet was actually some liquid nitrogen poured into a plastic soda bottle, which they then capped and tossed. As the nitrogen boiled, the pressure built up until boom!

Reading about the reaction sure makes me glad I went to college well before the War on Terror.