Continuity mistake: Agent Frank Burst screams "Stop!", but in the previous shot the police car was already stopped, although deputy Scott Kerber has just pushed the accelerator. (00:03:30)
Continuity mistake: After the crash Mulder rests his head on the passenger dashboard, however in the previous shot filmed from the outside he keeps it on the headrest. (00:08:30)
Continuity mistake: While hugging detective White, in the first shot Mulder's tie covers his shirt's collar, but in the next shots the tie is hidden under the collar. (00:26:10)
War of the Coprophages - S3-E12
Continuity mistake: The bug exterminator squeezes his throat with either left or right hand depending on the shot. (00:02:25)
Revelations - S3-E11
Continuity mistake: When filmed from the inside of the basket, the openings in the basket structure are big enough to put a finger into it, while in the outside shot the structure is compact and dense. (00:21:00)
Continuity mistake: Mulder jumps down by the fence in two configurations: one when he is filmed with a closeup (left side), and the other while he is filmed from the distance just a moment after (right side). (00:08:15)
Continuity mistake: Near the start, the train on the track adjacent to the train car's track is either moving or not, depending on the shot. (00:01:05)
Continuity mistake: Ellen stays by the door looking to the right from it, but in the next shot she looks straight at Mr Incanto. (00:33:55)
Continuity mistake: When the prostitute, Holly MacClaine, is first murdered, we see her face up. The next morning, when the police are at the crime scene, we see her face down.
Continuity mistake: When Mulder breaks into the boat, the door shuts, but in the next shot it's wide open. Shot after that, it's closed again.
Continuity mistake: The glass in the picture of Ryan Reynolds cracks as the casket is starting to catch fire. In one shot, which is wider, the glass has fixed itself. Cut to a closeup, the glass is broken again.
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