Help!! how can you tell if your python is hurt?! D:

[Breeshockster]

I just got a baby ball python and I'm super overly protective. My boyfriend placed him on our fire mantel even though I told him not to and he fell, it's about a 4 foot drop on to hardwood flooring. I am freaking out because I don't know if he's hurt. He is slithering around fine and wrapping around my hand without and issue but I read that they can break their jaws or backs. How can I tell if something is wrong?! ): I'm so worried that something is wrong with him.