One of the beauty contest contestants has a sash that reads "Miss Beverly Hills 90440". Meant as a spoof of Beverly Hills 90210, there is no zip code 90440. It is currently unassigned by the US Postal Service.
After leaving Parley Wayne Rockefeller's gas station in his truck, the "graphics" map shows the truck traveling through Tennessee. Nashville is shown too far east on the map (the city labeled "Nashville" should be Knoxville).