I think that flying knee was a total cheap shot, which sucks because I was rooting for Silva. I really blame it equally on Herb Dean and Anderson. Dean had already picked up the mouthpiece, and Bisping knew that Dean had it. There was easily time for Dean to pause the action. I can totally see why Bisping was protesting, because nothing significant was happening and it was the ref's job to pause it and replace the mouthpiece. Anderson was pretty cheap to capitalize on it, imho.