This image is dedicated to Victor, who asked for a dark shot... i think he mentioned he likes candle shots, so here you have my friend. This image is Much easier to obtain than this one...
Main tips to get this shot
1) Use a black fabric as backdrop (or something that doesn't refleclect light).
2) Focus (manually!) on the smoke.
3) Use an external light/flash located behind and at some side of the scene (avoiding entering light on your frame).
4) Try with different camera settings!
EXIF. ISO: 200, Exposure: 1/100 sec, Aperture: 5.6, Focal Length: 50mm, Flash Used: Yes. Post-processing: PS.