The theory is, after the 2nd pick, Vince kicked up a stink, throwing his helmet off. Then the Titans D proceeded to force a 3 and out, but Vince wasn't ready to go back in, not until Fisher came over and exchanged some "animated" words.
Fisher's version suggests Vince came out after the 2nd INT and said his hammy, which *was* listed before the game as an injury, wasn't up to scratch. Fisher then says he simply went over to Vince and "convinced" him to come back in. He then proceeded to injure his knee.
I'm not sure what to believe, but Fisher's story doesn't really add up to me. It seems odd you'd go over and convince your QB to go back in and he does without any real sign of a hammy injury which took him out. Vince ran a roll out on the play he really got hurt and didn't look to be restricted by his hamstring, at least not enough to come out of the game. One might argue Fisher is trying to cover up a serious violation by Vince.
It doesn't look good for Vince either way. He either came out too quickly over nothing showing poor toughness, or he had a full blown hissy fit. Some Titans "insiders" are coming out now and saying Dinger told him angrily he might put Collins in instead due to his 2nd INT, to which Vince replied equally as angrily "Go on then". This is pure speculation though and somewhat unlikely IMO given Dinger's preaching of patience with Vince, but then he *does* have a pretty short temper.