BAWAHAHAHAHAHAAA! I didn't even think of that one :-D
I'm gonna try it with a black background next for the stars, couldn't do it with this shot due to reflections in the eye etc, it looked mega freaking weird. My poor horses are gonna have the Canon baby-digi shoved in their faces for a series of eye shots, poor things. Good thing they couldn't possibly care less as long as they are getting carrots etc at the time :-D