Other mistake: After Todd phones Bob and tells him about the rinkle-dinkle regarding Larry's request, when the Munros sing about the Rolling Turd, in the close-up, as the RV drives past the camera, the sideview mirror is deliberately turned all the way around so as not to see the crew's reflection. This also occurs when Bob asks the Trooper about the traffic jam around Mt. Watson. (01:14:00)Super Grover
Other mistake: In the scene where Bob is trying to get reception on his pocket PC, he is on a rock and the pocket PC beeps, indicating that there is no signal. But when it goes to a closeup of the pocket PC, you can see in the top left hand corner that the signal is full.