I love how exasperated Haymitch is here. It shows how desperate he is to try to keep Katniss and Peeta alive; it shows how much he actually cares about them, despite his cover. He’s trying to make Katniss understand how this will keep her alive and it frustrates him because she’s just as bold and stubborn as he is.
I wasn’t too thrilled when they cast him, but after I saw the movie I was sold. He was perfect.