Originally Posted by Flag Guy 
Take for instance how it came up today - Guy I work with was talking about putting liquid nitrogen in pop bottles, capping it and chucking it to the otherside of the room. Little while later, bits of plastic everywhere.
Still nothing compared to a spark getting into a jar of gun cotton... Lets just say it's a good thing that glass jar was kept in a wood box (which valiently gave its life), and there is probally still a shard of glass in the ceiling of a particular lecture hall in Gilman
We used to do the same thing with dry ice in a 2-liter bottle in high school. A friend and I were in the chem room, and decided we wanted to try it. Unfortunately, both of us were only about 3 ft. away when it blew up - my ears rang for two days. There's
still a hole in the ceiling from where the cap blew through the tile.
