A chain won’t snap back when broken, but winches only use wire rope or synthetic cable which will snap back.
Back in the 1980’s or 90’s at Fort Carson Army base a tank broke down while “down range “.
A crew of soldiers went down to recover it. They set up to winch it onto a (low boy???) trailer. It was bitching cold so the whole crew sat in the truck cab while winching, in violation of the rules.
The cable snapped, cut off the top of truck, along with the heads of everybody in the cab.
