Well, I have to admit. When I first saw this I went into it thinking "Oh this must be a branch or rock which you just can't see in the dark".
So I went to enhance the brightness, fully expecting to see in the detail the hidden object which previously was not visible. But, much to my surprise no such object exists.
This is about as close to some kind of a full body vapor or possibly paranormal entity which I have seen.
This is the bottom area with the entity, brightness enhanced and zoomed.