When I was in college I made my boyfriend go with me to see the terrible movie Bad Girls at the dollar theatre. Literally, a ticket cost just a dollar.
I should have known that a movie about cowgirl prostitutes wasn't going to be a winner, but I was a big Drew Barrymore fan at the time. Anyway, as we were both suffering through a particularly stupid scene, he leaned over to me and asked "Do you suppose that horse is chewing my dollar?"
It was funny.