A lot of people decline medical treatment after a head injury. Or lots of other types of injuries. Even serious injuries.
Go ahead. Tell me they don't.
Except he didn't have that sort of head injury, he had scrapes on the back of his head and some separated cartilage in his nose. There was no need to go to the hospital because he wasn't seriously injured. But that doesn't really fit terribly well with his near-death experience now does it...
Joe