Who in the hell talks like that in the second panel? "Proposition"? "Difficult to construct"? If Chip was trying to get us thinking we really were talking about a road bridge, he failed by putting that coat on the dentist. The second panel should read something like "A bridge is an expensive procedure to do," but then the joke in the last panel would really work.
But then again, when does the joke in the last panel ever work?
