If you look where the person is standing and zoom in and magnify you will see a very strange vapor. Its oddly shaped and almost looks like its swirling around and then forming to her side. Seems to be coming from the right swirls and then forms to the left of her.
So then I zoomed in and looked into the darkness on the right hand side of the photo, top right corner. Where it looks like the mist is coming from. And you can see traces of the same mist on the ground.
I also looked at the left and other dark areas and found nothing strange in those areas. Interesting photo indeed.