A friend of mine told me a while ago about this article he read ~50 years ago about some prisoners being blindfolded, told they were going to be cut with a razor, and having an ice cube rubbed on them. Apparently it felt like a razor and because of "mind over matter" the prisoners actually got cut and started bleeding. I've been trying to figure out if this has any basis in an actual article or if my friend is just remembering something badly. Has anybody else heard of this or know where this legend came from? I'm usually pretty good at finding things on the internet, but none of my searches turn up anything, and it doesn't help that a Google search of 'mind over matter + ice' turns up 10 pages of lyrics for Ice-T's song "Mind Over Matter." Any help would be greatly appreciated.