A number of people asked me tonight about Smoke Art.

It's a random process really - once you have the basics right.  I followed this tutorial on the Photoanswers website, and found it really good.

http://www.photoanswers.co.uk/Video-Tutorials/Search-Results/Camera-Techniques/Create-smoke-abstracts/

I used the black side of a round reflector as thte background, and used the inside floor-liner of a Superquinn bag (as it tears easily) as a sort of snoot on the off-camera flashgun.

If you have any questions I will be happy to help.