Once I had a professor who was famous around campus for a) asking his students ridiculous hypothetical questions in a very soft, disarming voice, b) filling his lectures with long, awkward pauses in which students were unsure whether or not to say anything, and c) generally being old and useless.
Case in point: "Oh, Oedipus. Killed his father, incestuous love-children with his mother. You say, 'Oh, well, he didn't know.' OH, DIDN'T HE?" *thirty second pause, staring at the class*
And: "What if you had been a shepherd? You'd stand out there all day saying, 'Look, nature. Sheep. Stars.' "
And: "If you cheat on this exam, I will throw an unpeeled pineapple at you."