To me it looks more like the feet of this person is about to catch on fire rather than the smoke coming from the other side. But the harsh lighting does kind of give it a weird, paranrmal look, I think there needs to be more to this photo.
The textures are great, the smoke is just right, and the lighting works well. The only thing that didn't strike me right on my first impression is that the feet seem too close to the door. It feels to me like the toes must be almost under it which takes away from the feeling (that I imagine you intended) that this ominous door is about to be opened. Still, the overall effect works well and it's very otherworldly indeed.
---After looking at it for a while, it strikes me that my initial bias was to see the door as pulling open rather than pushing open. Strange psychology on my part, but I'll leave that comment in for your entertainment :P