Visible crew/equipment: When Scully asks Mulder, "Are you losing it?" the boom mic is at the top of the screen. (00:23:20)
Visible crew/equipment: When the Senator opens his car doors, a filming crew member in blue jeans is reflected in the door. (00:32:25)
Visible crew/equipment: When Mulder is driving away from the gas station, crew members as well as some filming equipment can be seen reflected in the car's body. Mulder is in a pretty desolate area, so seeing people reflected in the car's body would in all likelihood be crew members and not random citizens. (00:28:30)
Answer: As he stated many times throughout the series, Mulder needed Scully to be sober and skeptical. Whenever Scully's skepticism wavered and she started questioning her own rationality, Mulder would try to restore her sense of skepticism, because he needed her to be clear-thinking.
Charles Austin Miller