Well, it states they rebuilt it from a wrecked condition once, guess they get to do it again.
I have seen a lot of things happen doing my job, had a chain go flying by me one time as it broke because an "operator" was "helping" me unchain his equipment. All I wanted him to do was pull ahead to get some slack in the chain. He went full throttle with the motor, and for some reason when he stepped on the brake it went backwards. One chain broke (I had it cross chained (like an X for those unfamiliar)) and the machine lurched to the side. He stopped. Shaking like a leaf. So we tried it again and again he went full throttle. I hollered at him that time and told him that everything is done on my trailer at an idle when possible. So he idled it ahead and I took the other chain off without difficulty.
I did also slide an excavator off my trailer while I was loading it. Steel on frost is not good. I knew I wasn't dropping far so I was ready for the ride. Just rode it out and hoped that nothing broke.