For those who don't want to click the link, it is the crowd singing Take On Me during game 5.
And I like it infinitely more than the President's race because the crowd- the Nats fans- started doing this on their own eather than having the organization force it upon them à la President's Race. Same thing with everyone doing the Shark.
And an active crowd pumps up the players so I am interested in how a crowd reacts and act during a game. Some people may not give a crap but the crowd is important.