Sand Won't Save You This Time: the story of chlorine trifluoride (pipeline.corante.com)

Sound like much more fun that the ammonium tri-iodide that we made in high school chemistry lab.

I like the last line "For dealing with this situation, I have always recommended a good pair of running shoes."

"If in doubt, run." is good advice in most any situation.

If you let it react with water it gets to be even more fun (http://en.wikipedia.org/wiki/Hydrofluoric_acid)