Smoke is such a mysterious subject to shoot. It’s really unknown as to what your going to get until you start shooting and later look at what you’ve captured. The smoke can create the most interesting shapes and take on familiar forms. Below are great examples of this process. What forms can you see the smoke assume?
CSD
Mal Smart
Dude Crush
ernando
Per
Mark Fleming
RNEVES
Marco
Mark Fleming
David Boehm
mad_airbrush
seanhfoto
lindes
source: http://www.thephotoargus.com/inspiration/30-ethereal-examples-of-smoke-photography/