23 percent bodyfat...ONLY?? You have 69 lbs. of fat on your frame. I really wouldn't be yelling about that, and I doubt too many are jealous of that either. There is no way your friend kept 40lbs of muscle from 5 weeks. He may have gained 20lbs. of water 10lbs. of fat and 10lbs. of muscle in 5 weeks, but no better than that, at least not by much. I think he was on a fried chicken and winstraw diet.