LOL!! I am not really sure how long a normal movement should be. I have never really sat and watched one poop

Though, if it takes a super long time it could be from over feeding, too large of prey and even basking temps not helping to digest.
Can you give some info on your temps in your enclosure. Day, night and basking. Also the size of prey, what type of prey and your feeding schedule along with how old and size of the animal?