Quote from Dewey in Hal's Dentist
Malcolm: [wakes up] My back's killing me. What happened? Dewey: Malcolm, you're awake. We were worried about you for a while. Malcolm: What happened to the new mattress? Dewey: What are you talking about? Malcolm: The mattress! I know there was a mattress. Dewey: Maybe it was a dream. Malcolm: It wasn't a dream! The mattress was perfect and white, and it felt like a cloud! It fell out of the sky, and it made me happy! Dewey: Was it just a bed, or was there a beanstalk, too? Malcolm: [sighs] Maybe it was a dream. Dewey: You were happy, Malcolm. Of course it was a dream.