Reminds me of an experiment I saw in a book when I was a kid. Get a big tin like popcorn comes in; drill a hole in the bottom big enough for a funnel. Put the funnel in the bottom, attached to a piece of plastic tubing. Place some flour in the funnel, put a candle in the bottom, light it, put the top on the can, and blow on the tubing.
As a kid I didn't have much money for a real long piece of tubing which was a big mistake. The results were spectacular! Blew the can apart, and scared the dog-to say