From Nate Silver again:
When the train arrives at the Pentagon station, there are huge lines to get up the escalators toward the shuttle buses they have waiting outside. So someone gets the bright idea to begin walking up the down escalator ... and dozens of people start following him. Before long, there are two think columns of people -- black, white, the young, the old, the healthy, the frail -- marching up the down escalator, as couple a police officer looks on haplessly and helplessly. And the people are chanting, quite naturally, "Yes we can!".
