I recently read a whole web page entitled, "1001 Things to do with Liquid Nitrogen". LOL Among them was a story of a chemistry student who put liquid nitrogen in a soda bottle (the large kind, 1 liter maybe? can't remember). This was in the school's lab Anyway, the bottle started expanding, because the nitrogen started turning into a gas. He thought it would explode so he put it in the school bathroom, in the sink. It did explode, and nearly/fully ripped apart the sink!! Then the lab professor gets a call from the police saying that one of his students blew up the lab with nitroglycerin.. the police were misinformed But, it gave the professor quite a scare!