Unless he loses the nails. That's always fun.
I still have one finger where the nail never grew back the same after it got slammed in a door. And there's a nerve that's out of place or closer to the surface than it should be or something. Mashed it good, I did.
I think Mom was more worked up over than I was at the time. It bled.
His fingers didn't get caught. It was the back of his hand.