Throwing a Book at a Teacher

While reading the novel I came across a cartoon that i thought was really interesting. It was the cartoon where Arnold is throwing his geometry book across the room at his teacher. I think he is doing this because he realized that he has his mother book from when she was in school and that he realizers that he is going to have the same future she has unless he does something about it. He wants to be a successful person and he throws book because he has so much anger built up inside of him!!(page 31)