I've checked him over, his breathing's fine, he's had some child-brufen and half an hour down the line he's not seeming too bothered. But he went with quite a bang and I've known people crack ribs doing that, is there anything I should watch out for? I know that even if a rib is cracked there's not much that can be done having bust one of mine 30 years ago climbing on stage at a gig...