Ive always been fascinated with the way that smoke appears in images and after a while I realized its all about the lighting. This is something anyone with two phones or a friend standing by with theirs can do. If you're out doing hookah or...something else, all you need to do is download a flashlight type app if your phone doesnt already have one. Put one phone on the flashlight app and point it at one side of your face, with the other phone you take a selfie from the other side. With the light coming from one side and the picture from the other, it will highlight the smoke perfectly.