The footage below is on a stretch of the A1(M) just north of Leeds, a section of motorway I have travelled many times. I had difficulty believing it was not some film set staged stunt at the time, but it appears it is genuine and the lorry driver was unaware he was cruising along at 60mph pushing a car in front of him.

Astounding that this did not result in any serious injuries. For all it is a fuel efficient and thrilling way to travel, I am not sure it would be good for your nerves or the side of your car.