Has anyone ever seen the web photo comic with the guy who writes a witty truism or graph joke on a blackboard? The picture usually includes him pointing with chalk at the blackboard. He always wears a red sox hat. I stumbled upon it long ago, and my history does not go back that far, nor does google return anything sensible. I ask because I saw him today on campus in Ithaca, NY but he left before I could talk to him.