He believes that it is easier to handle strangeness when they have a reason to explain it. Therefor, he pretends to act drunk. He thinks that children haven’t lost the feeling that it is wrong for white people to treat black people badly.
I'm not sure if that's a part of a bike, but I would say oval since the circle is an oval shape. Correct me if I'm wrong, but I hope this helps and good luck! :D
