Claire: You have to stop him. Frank: I'm trying. Claire: Trying is not enough, Francis. Frank: Well, I can't sit next to him in the hearing room with a gun to his head. Claire: That sounds like an excuse. Frank: It's a reality.
When Doug Stamper sits down at his laptop and throws the contents of his cup at the screen, the image immediately freezes and distorts. This would not happen so quickly in a real world event. It may eventually happen but not instantaneously.