Smoke photography - colorful smoke

Hello people! Yesterday I organized some event of few my best friends, made some bbq because we haven't seen for a month. While I was making bbq I came up with idea for photo, smoke photography. One of my friends is using vaper which gives a lot of smoke, too bad it was day so I had to do my best isolating smoke in that environment. I'm talking about first photo, as you can see, we were outside. I can't believe about that smoke colors, I didn't put any color there, just pulled up in post from RAW photo.

Same on the other ones, my girlfriend was smoking ordinary cigarette. In RAW I just changed warmth and that's it. They came up really beautiful. You probably know how I did this but I will tell you again, for someone who don't know. I just placed flash behind her to create silhouette of her and isolate smoke as best as I can. That's all, after that, there will be trial and errors of exposure settings. You need to find perfect exposure for this, I did after few shots. :)

Enjoy! :)