Puff of smoke

[Bebusfriend]

Apologies for the unusual video, I was just curious, is there any substance that when you throw down, creates a wall of smoke to disappear behind? Or, is there anything that when added to water, can create the same effect? See video @ 1:23 - 1:24 secs

http://www.youtube.com/watch?vmGaVP4RtoAQ

Aladdin - 0:41 - 0:42 secs

[Loosehead]

dry ice generats smoke on it's own and very rpidly when added to water.