It´s a pity that the animation is flickering like that at the end, because I found it quite entertaining (Always great to see something move right?) As per the *MB file, it taxed my computer (only way of watching it was by Bounding Box only) So I sincerely don´t know what to do with this one.

I thought the problem might be the fog or the fact that the camera passes just through the moonglow. Somehow I think it might be over there the problem. When you saw the autoexposure option did you actually turn it off?