What I really love about this is the unsettling feeling of the picture. You really feel as if something is going to jump out at you, and I wouldn't want to see what's up that ladder!
The shot itself has been taken from a good angle: quite far back, but not so far back we can't see anything. The light coming in from the door gives a very nice effect as well :3 Personally, I think you could have taken it on an angle to make it more interesting, rather than straight on.
I've seen shots like this many times, which is why I only gave three stars for originality.