Not sure if I got the name right - but he was some sort of magic performer who like Houdini could control his body - and on Derren Brown's show (channel 4 uk) he was mentioned as Derren placed a plastic bag over his head to slow his pulse to very very very slow - which enabled him to walk on broken glass without feeling pain or cutting his feet.

I assume the blood flow wasnt reaching his extremities - anyway he mentioned this man Prestoni (sp ?) who used to be a master of this and I fancied reading up more on this man. Does anyone know his correct name or anything about him? cheers for any help