Joe said this because he knew Kris needed to laugh, and Kris did. 두 사람은 간호사가 들어올 때까지 몇 분 더 이야기를 나눴습니다. Joe told Kris to keep pushing and stay positive, and then he said no more, because Joe says to people only what he knows they need to hear, and thats all Kris needed.