He has a head ache and is scraped up but is going to be fine. Here is his bike tire:
I'm sure that the helmet saved him from a serious head injury.
I'm thankful we live in a society today that promotes people wearing seat belts and helmets. When I was a kid, we made fun of people wearing seat belts as if being safe was uncool. I remember wearing a seat belt for the first time when I wasn't much younger than my son is now. It felt strange and constricting and a little over protective. I'm so glad things have changed. I'm so glad I am typing this right now, stating the obvious, instead of sitting in the emergency room.