Also, Karen's rationale for saving Harold, where she says that someone who knows he's going to die, could prevent it, but goes through with it anyway because it means saving a child, is the sort of person you really want to keep alive.
Harold playing the one song he knows for Ana - which she sings along to - and being suddenly pulled into a kiss. It's the looks on their faces, and the last note Harold gets out before he's distracted...
Ana: I want you too.
"Sometimes, when we lose ourselves in fear and despair, in routine and constancy, in hopelessness and tragedy, we can thank God for Bavarian sugar cookies..."