NPR : The Quest to Design the Perfect Yawn

NPR : The Quest to Design the Perfect Yawn: "The professor of psychology at the University of Maryland remembered the famous Monty Python sketch about a joke so funny that it killed anyone who heard it; The British, naturally, wanted to use it against the Germans, and the Germans vice versa, and both sides furiously pushed to develop the first 'Doomsday Joke.' Professor Provine decided to do the same thing, but not with a joke. He proposed a Doomsday Yawn."