“Tell me about the sharks, Rosie," Dave said, trying to cheer me up. "Well, you can't tell how dangerous they are from their size. That's all wrong. The big ones don't always feed on meat." "How do you tell a dangerous one?" he asked. "Their teeth." "So what, you ask them to smile?" "If you're stupid enough to come close and see them smile," I said, thinking of Luke, "then you deserve everything you get.”