I think what you are describing here is a bit ridiculous for most people. Personally I think you could have these mental experiences that you speak of without fasting for 21 days. Also I agree that this wouldn't work unless you have a store of fat to burn. Those that are already thin would seriously be hurting themselves after 7days of fasting.
Also about eating PIZZA and CHIPS maybe this is the reason you have 40 extra pounds to burn.
My advice for everyone is to keep it healthy in a general sense and there is no need to FAST.
Chris
Good Luck In All That You Do!
Check my personal blogspace at
www.CMAlexander.com:)