This streaming video shows the fun that one can have with a gas, sulfur hexafluoride.
More like this
This just reported today from the Washington Post:
For various reasons I can't talk about, I'm not in a good mental place for deep and thoughtful blogging just at the moment.
Oh, neat! I like the second demonstration.
Bob
That is way too cool! Really jazzes the (not so) inner nerd in me!