When Mulder and Krycek are run off the road, the shot shows them both still sitting upright. The next shot is of the interior, and they are semi-conscious and slumped over the dashboard.
Scully is seen wearing spectacles, with flat glass in them from the reflection on them. Later on other actors who normally wear spectacles, are seen wearing spectacles with curved lenses.
When Mulder and Scully get out of the car at the silo, camera and crew are visible on the reflection of the car body