That was quite cool, I definately got the sense that something big was coming, and I dind't want to be there when it finally got near me, heh. The only thing I have to say is that the perspective seems...off for some reason. He seems to be walking straight to the side or slightly away from the camera, and yet...the front of his leg seems turned toward the camera...as if it's wounded or something. Other than that, you had the photorealism down...good stuff there.
