Day 63 - smoke gets in your lens

Another mini-project I've been meaning to try for a while is photographing smoke.  I've always loved the shapes and swirls that form when you blow out a candle and this really wasn't too tricky.

Pre-focused Nikon D50 on a tripod with a single bare flash triggered with Cactus V4 90 degrees camera left.  The flash was gobo'd to keep the light off the lens.  Then repeat until you get fed up...