It's smoke. I took some pix of my new house recently. I forgot I was smoking a cig whilst taking them. They looked pretty freaky allright, until I remembered.
However, there's something IN the smoke that looks pretty strange. It doesn't seem to wrap around them or anything, THAT's the smoke. But it might look like the devils head. Or it could be the back of a dude wearing a union suit with suspenders. Cain't tell. It is a little strange. Cue the X-files music.