Nah, nothing so simple as that. I like to take a test-tube (the kind with a stopper) and put some
liquid canned air in it (hold the can upside-down and the liquid stuff comes out instead of the gaseous), then stopper the thing and wait for it to burst the stopper out. Makes quite a noise, and you get pretty impressive range if you do it reasonably well.
You just gotta watch out that you don't get the liquid on
yourself -- frost-bite, you know.
