Dr. Roy Lowry demonstrates what happens when liquid nitrogen returns to its gaseous state. It involves the release of a lot of energy. He blew it up real good! -via the Presurfer, celebrating 12 years online today.
I wish my high school chemistry classes would have been more like this, and less like "yet another math class."
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We did this kind of thing with dry ice bombs all the time as kids (got arrested and driven home to my parents for it once), but it would be a federal case now. We never thought to do it in a trashcan with ping pong balls; that's clever and somehow makes it seem more science than hooliganism.
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Way to go Plymouth University. Now the only think I associate with your institution is petty issues over copyright.
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