I was looking more along the lines of a fighter blowing up to 3 or 4 weight divisions and then deflating back down another 3 or 4 divisions and there are aren't any. Blowing up and moving up can be done as few have accomplished this but none can get back down to where they began. I guess James Toney is a prime example of just how hard losing that weight is once you have gained it. Bless his heart.