In the episode where Rebecca is mad because she's not getting any credit for making the rich guy she was having an affair with turn himself into the police(he was doing tax evasion or something like that), there is a part where Woody is at the bar, and he is reading a Gary Larson Far Side comic, and says "I don't the far side.", Norm takes the comic and tells him the joke to it, that in one panel the cows are acting normal, and in the next panel, they're acting like humans. This can't be possible, since Gary Larson's Far Side's have all been done in one panel.