Hypno birthing?

Has anyone considered this? My mom's friend was telling her all about it to tell me. Apparently she was there with her cousin and thought she was crazy til she saw her go through it. The woman's husband watched her tear when the baby turned while coming out and the woman didn't even know she did because she didn't feel it. She was also walking around no problem at 9cm dialated. It sounds absolutely crazy to me because I can't see breathing alone making you feel no pain. This is also the first time I've heard about it so I was wanting to see anyone's opinions of they've done it or know much about it. I've read a little and still think it's insane but if it works then I'd be willing.