Couldn't stand the guy, but sorry he died. ALWAYS go get checked out. You don't know how bad you are hurt. And if it is a head injury, by definition you aren't able to make your own decisions because you are impaired.
A friend told me about her father-in-law who was in a car accident and wouldn't go in to get checked out. He said he was just banged up and wanted to lie down. When he woke up he was paralyzed. Apparently there was trauma to the spinal cord and while he was sleeping it had swollen and the vertebrae severed some nerves. Moral of the story -- always go get checked out, even if you think you are OK. 3 hours of "wasted" time is nothing compared to a life in a wheelchair or death.