The Smoking Bowl!

Have you seen a smoking bowl before? No? Well let me show you hot it looks like.







It's a bowl with white "clouds" coming out from it. Cool huh? It seems as if something's gonna pop out of it. Now you have a reason not to eat that horrendous bowl of soup.

Here comes the interesting part - The Question!

What caused those smoke? No...it's not Steph who photoshoped all those smoke there.

I don't have any prizes for the correct answer, but the first to answer will get the satisfaction of being the first to answer :D

Update 29th May 2008:
Bob was the first to guessed the correct answer. The answer is dry ice was placed in the bowl of water.