Watched "Breaking Away" tonight and was reminded of auto/truck pacing by the scene in the movie. Have only tried this once many years ago. It was more fun than should be allowed but rather dangerous. At the time we (the kid in the van and me) were more worried about the cops than an accident. I managed the stay at around 40mph without too much work. I backed down after spooking myself by thinking about what could happen if the VW van 2 feet in front of me had to stop or even slow quickly. My friend had no such inner demons and got up to around 50 before spinning out his gears. This was in the 70s. I've never done it again, nor would I. Anyone else ever do this kind of thing?