Today at about 2.24pm, I ran like my life depended on it. I was trying to catch the train to New Carrollton. When I heard a train pull up into the subway while I was still trying to swap my card through the entrance, the rate of my heartbeat doubled. Well, kind of. I was worried that I would miss the train. So the first impulse when I got off the escalator was to increase my speed in order not to miss it. As I got to the front of the door, the train went "panpan-pan pan" and shut the door.