Hand pound
When things go wrong, my brother Rick (he's 27) completely loses control. If he drops something, he calls himself "drops the clown" and smacks himself with a hammer on his hand. Other times if something gets him mad, he'll hit his head and face until he's covered in bruises and screams "a hee hee hee" as he does it. I know this probably comes across as a bs question but sadly I'm making none of this up.
Other times he'll just yell "shall be" or "the angels are here" over and over. He isn't retarded, he was valedictorian of his high school class but never had any friends and can't hold a job.
Are any of these things that he does normal?