Continuity mistake: When John Candy and Steve Martin are travelling from Jefferson City, Missouri to St. Louis they are seen crossing the Mississippi River to enter downtown St. Louis. This would not have been possible unless the bus driver overshot the entire city and ended up across the river in Illinois.
Trivia: There is a short scene after the credits. You may have to go back to the beginning of the movie to understand the joke.
Question: This question is about the scene where John Candy is the driver, and Steve Martin is the passenger in the rented car. Steve is unaware at one point, that they are going the wrong way on the highway. He becomes aware, after looking out the window and down onto the shoulder of the road with the wet snow splashing up. As soon as he looks at that, he knows they are going the wrong way. What was it about the road that made him realize it?
Question: What is the "discount credit card" that Del uses when checking-in at the motel? While Neal is paying, it looks like the staff switches his card for Neal's (Diner's Club), that Del later uses to pay for his car rental. However in the morning, once they realize they got robbed of their cash, Del says that he does not have any credit card (other than a Seven outlet one).AnthonyA