I'd say he's probably in the clear, but it's definitely worth it to get it checked out.
I one time had a Red Eared Slider take a similar fall. I was only about 11, and I let him walk around on our porch, took my eye off him for one minuet, he went off. He landed on some soft stuff, and ended up fine, and needless to say I never let him out of my site again.
I one time had a Red Eared Slider take a similar fall. I was only about 11, and I let him walk around on our porch, took my eye off him for one minuet, he went off. He landed on some soft stuff, and ended up fine, and needless to say I never let him out of my site again.