Twice a week, I ride the train to Boston. My commute starts with a quick walk to the suburban station near my house, after forty minutes on the commuter rail, I either walk a mile or jump on the trolley to East Cambridge. The people watching is varied: sometimes it's townies heading to the big city for a day, there are some high school kids heading to school, and you get quite a few tourists. On the train, though, it's mostly commuters. We're a quiet bunch. Unless you sit with your friends, you're usually reading, sleeping, or staring off into space.