In the late 80's I studied Zen meditation for several years and got to the point where I could reach my hand into a bed of red hot coals, pick one up and blow on it till it turned white hot then put it back without any sort of injury or discomfort. I also once did the Fire walk with a group of Tony Robbins affiliates. I am wondering if others wold be interested in sharing similar experiences, or describing how they are achieved.

I think they are done by raising the vibration level of the flesh to that of pure energy

Thanks!