I got an odd feeling when my wife and I saw them on the American carnage tour,Jeff did not seem himself,he was kinda stationary and it seemed like he was either in a bit of pain,feeling weak or just not fully with it. perhaps he was staying still to keep from hurting,whos to know.then late last year at mayhem festival Gary Holt from Exodus took his place,I wondered about that too,I just didn't know he was ill. R-P