I agree about the Headless Horseman - definitely cool. I got a pretty decent picture of him last year, but can't figure out how to post pics on here. If I figure it out, I'll post it here. Riding Space Mountain at 11:45 pm with no lines and barely any people was pretty cool also. Try to check out Philharmagic too since it won't be nearly as crowded as during the day, and the decorations and music really give MK a different feel.