This morning I ran into a friendly acquaintance on the bus (as opposed to the kind that inspire you to hide like you're in 8th grade). We met at a party and see each other sometimes on the way to work or at the grocery store. We were having a nice chat, as we generally do, when we reached the redline stop. I was running a bit late, as per usual, so when I reached the top of the stairs and saw the train sitting with its doors open, I rushed for it. I was very surprised to see that there was no one in it. I briefly wondered if I was really that late, then heard the woman I had walked up with say "you're going north?" I spun around and tried to stop the doors, but just ended up with my hand caught in between, waving futilely as we pulled away.