Every so often the song in my head is "if you chance to meet a frown". If you are really lucky then I will even make a prop (usually a plate, with a marker) and sing the full song. If you are even luckier than I will sing the full song and let it get video'ed. For those lucky few - you know what I am talking about (or if you are Amy we likely sang this in seminary together).
When I was at the Scripps museum all I could think of was: These fish need to turn there frown upside down