"Knock-knock jokes have been on my mind. For some reason, they come to me while traveling in the car. My favorite is 'Knock-knock, who's there? KGB. KGB who?' Then I can't help but laugh before I get the answer out. Something's been going on with my laughing. It gets in the way of the joke. The answer is supposed to be 'KGB asks the questions.' Now, that's much better, no laughing that time."