Hmm. That's an interesting question. Frankly, I must agree. If I smoke too much, I feel bad, but I don't feel an increase in the high after a specific point. At this time, we must also deal with oxygen deprevation, which, I imagine, would lead to feelings of a greater high, but also equal or greater sickness. But I think there is a point where you get stoned and can't get any more. But, as far as smoking one's self sober, it's never happened to me, and it smells distinctly of horseshit.