I don't think this really counts, but it was in Back to the Future part 1 and bugs the hell out of me. In the scene where Marty travels to the past and slams on the brakes, you can CLEARLY see him have to mash on the clutch petal, meaning it uses a regular ol' clutch. HOWEVER, earlier in the movie, Doc controls the car with a radio control and gets up to 88 miles per hour. HOW CAN THIS BE?! If it were some sort of hydraulically controlled clutch, Marty would not have had the need to stomp on the clutch when he braked.
