Dilbert sits at his desk and Ratbert sits on the desk. Ratbert says, "Sometimes I think I'm not reaching my full potential as a rat." Dilbert replies, "You're right. In the Middle Ages, disease-carrying rats wiped out half of the human population of Europe." Ratbert says, "I think I've got a little temperature. Feel my forehead." Dilbert says, "Face it, your glory days are past."