i've been talking about this on some of the franklin vs anderson threads. many fighters/trainers like bas rutton believe this is the most devastating blow you can land on an opponent. if you've never been struck in the liver its kind of like getting kicked in the balls. you just want to go down. but since its a legal blow you either try to continue or deal with getting punished for not quiting. because the bottom line is it's alomost imposible to go on. silva caught rich three times with knees to the liver. so any discussions about the looks rich was giving silva, theres a good chance he was thinking omg what did you do to me??