Not eating and drinking for 70 years o.O

Not sure if I believe this. I've been in Psychology class and there was an Indian man that could stay in a 'bolted down' metal room or cage, and he stayed alive for hours and hours and hours by taking in 'less' oxygen than the normal human. He learned how to control his nervous system or whatever. Supposedly, it was said that it was impossible to control certain bodily functions as such, but that certain man has proven doctors and scientists wrong. It was all documented, and everyone in the class watched the video on tape. I was surprised too.