since there are many uses they could be put to OK, OK, I have heard of the rack being used as a treatment for back damage. I heard that Francis of Loyola who founded the Jesuits, his back was damaged in a battle, and afterwards he spent a long uncomfortable time in a rack, presumably willingly, to try to keep the bones in line while the injury healed, and during that he went religious. - To avoid any confusions hereinabove, in all my images with chain in, the chain was lying loose on the seabed and not tethering or restraining anything.