There are two engineering students walking through their university campus. They are talking about pendulums when one looks at the other and asks "Where did you get those clothes?". The second stops and tells the first "Oh, it's a funny story. I was walking along yesterday and a woman came up to me. She asked me how to get to the cafeteria, so I told her. She was really pretty too. I wonder if I'll see her again." The first thinks for a moment and replies, "That didn't answer my question."