I've observed a new trend in the yard lately, Drivers backing trailers with Dollies on back. This has also caused an increase in Dollies being damaged.I have actually seen a driver drop his dolly off the back of his tractor, grab the lead trailer, hook the dolly to it and spend unknown amounts of time and effort backing to his rear box. And on a few occasions have seen same driver take dolly over to shop for cut air lines or bent releases, and even seen them go ALL THE WAY under trailers that where dropped too high! Ya Know, if your a Super trucker and can perform Roadeo tricks, I say go for it, but for you novices, learn a new trade, or do it right!