Sophomore biology class, almost time for the bell, everyone just sitting around. Kelly raises her hand, teacher calls on her. Kelly says, "I heard a joke on the bus today, but I don't get it." Teacher (grading papers) absently asks Kelly what the joke was. Kelly says, "If big people can have little people, why can't big trains have little trains?" Teacher (very foolishly) asks Kelly why. Kelly answers, "Well, they said it's because the Illinois Central always pulls out on time."
