What is it about the bus that attracts the nutters?

When I first got on the bus I just figured the guy was having one of those animated loud conversations with another passenger, that men have. It took about 2 minutes for me to realize that he was talking to himself, as no one answered back to his statements. The rest of the bus ride was ‘concerning’ as he talked about going into hand to hand combat with his enemy (with body movements to illustrate), his enemy being evil in general. Then there was the cursing and insulting of foreigners, but really that paled in comparison to the Kung-Fu moves.
Couldn’t get off that bus fast enough.