Near the beginning of one semester, a colleague of mine announced in his idiosyncratic manner, "Okay, kiddies. It's time for our little quizzie."

Apparently, the quiz was difficult, and while leaving the room, a student stopped and said to him, "Boy, if that was just one of your quizzies, I can hardly wait to see your testies."

Realizing what that sounded like, the student ran out of the room and is probably running still.