The vehicle they are driving is a Hummer H2 made by GM, but the shots of the radio are of a Chrysler radio, not found in GM products.
In Guy Gibson's house, at midnight, the grandfather clock strikes only nine times.
The group is on its way to Oregon. Along the way, they stop at a shopping center called Jantzen Beach Mall which is in Portland, Oregon. Upon leaving the mall, they then see a road sign stating 10 miles to Oregon.