Thanks for your opinions guys. I am not sure what I think of this photo. I don't know whether it is real or if it has been manipulated, but I will just say a few things:
I agree with Darsawl, it is a good pic- I am sick of looking up ghost pics on the net only to see a photo of an orb!!
Secondly- I think if we did come across a real ghost pic, almost everyone would still say it was manipulated in some way. To be honest, no one really knows what a ghost should look like on film, unless you actually saw it with your eyes then snapped a shot of it. Maybe ghosts do look like orbs, maybe they do look like cigarette smoke, maybe they do come out on film looking like a double exposure- Who knows?