Smoke.

The dynamic still life, an experiment with smoke and light. I would like to say that this image was skillfully captured, but it was more along the lines of a lucky catch.

Canon XTi with Tamron 90mm macro lens, single Alien Bee 400 strobe. 1/200@ F 16.0, 3/4 power strobe. Image was inverted and converted to B&W in Photoshop Elements.