I don't think he jumped, but 99% sure he fell once from the tree in the tank. His back legs stopped working overnight, a week before that he stopped eating.It may be that he jumped at some point and hurt himself, it's a very beautiful tank but very large for a baby. Still, if he's improving then that's great news ! Did you get him from a shop or a breeder ? It's good to start babies or injured ones out in a plastic bin like this, when I was raising babies this type of set up insured that the babies got enough uvb and could not be injured because it's not so tall.