I'm a VERY deep sleeper, and have been known to zonk out for really long periods. But when I'm fasting, I sleep light, and if I can get more than 4 hours in after day 5 or so, I'm shocked. I think that it takes a lot out of a person poisoning themselves all day long, and when you trade the heavy burden in, your body is still running in 5th gear, but the resistance isn't there. I wonder if this happens to raw foodists or others who have awesome diets while they're fasting? Keep it up!!