Hi, you can go to this site http://www.whatifthemovie.tv.
This is actually a documentary film and one part of it talks about sun gazing, breatharianism that is living in air and light alone. Shri Hira Ratan Manek the master sun gazer himself who survive without eating for 411 days is the one giving tips and techniques of living in air and light. He also talks about the benefits of doing it.