i ate alot of shrooms(philosophers stones) once, it was definatley more than an oz, but i cant remember the exact ammount. I was trippin for a good 8 hours, visuals and everything... didnt properly come back from the "other side" for a couple of days. It was an experience that changed my outlook on a lot of things... be carefull, shrooms can fuck you up, not in a bad way but they can completley change your personality if you do them too often. A friend of mine did them too often and now hes a different person... not trying to put you of, just speaking from experience... I do them quite a bit!!