Try to hold it, you lose it
Smoke Photography : From some years back with my point and shoot. Used night sky as the background, dhoop sticks for the smoke and clicked with the camera flash..Had to do a lot of trial and error but it was worth the effort. The unpredictability factor adds to the fun. You don't know how your click is going to look like. And you are surprised at every click - either pleasantly or otherwise and then you make your own interpretations of what form the smoke took in your click.:D Nice fun!