Have you read about the Jansenists or the Convulsionnaires of Saint-Médard.
They were a group of religious zealots that also demonstrated supernatural invulnerability to external trauma. According to one instance I read in The Holographic universe, the public would participate in their demonstrations. One man allegedly swung a hammer into a female practitioner's abdomen and she was unaffected, but the brick wall behind her was damaged.
Site Admin Merlin Posts -Hey Wireman, check this one out..
Merlin Eh,
Ouch trepanning -uh oh- not my cup of tea..Ancients swore by this as evidenced from what I've read , some years ago.. not really up to date on this procedure ATM--but for now I'll take a pass.. Although I've been accused of having done just such a procedure..by some, around me ! Alas.. No respect..