"When I was a child, I took a karate class," Miss Matheson said, 
astonishingly. "Dropped out after a few weeks. Couldn't stand it. I thought 
that the sensei would teach me how to defend myself when I was out on my 
skateboard. But the first thing he did was have me sweep the floor. Then he 
told me that if I wanted to defend myself, I should buy a gun. I came back the 
next week and he had me sweep the floor again. All I ever did was sweep. Now, 
what was the point of that?"