Will You Stand Up?

When I come to New York City from China, I was attracted by everything new here. One of the fascinating thing here is the baseball. So I start to watch game in Yankee statium and Citi field. But what make me feel confused is a part of the game. At a moment, everyone would stand up to tribute a veteran in each of the game. As a foreigner, I start to record the scene and come up with questions.