I've had the something's on fire bit happen a few times. I just stand there puffing awY while everyone runs around trying to find the source. Once, in the early 70s, I was in a restaurant, when a diner from another table came over and said: "Thank you for spoiling our lunch!" As I was sitting in the smoking section, I thought of several appropriate remarks, the first one dealing with her and the horse she rode in on, but she left before I could offer any of them. The one I love best is when the pretty young things tell me that their grandfather used to smoke a pipe. Sure makes a fella feel young.