I have and saw all three fights. Santana faked the first fight and the shot in the second fight didn't look hard enough to knock him out but who knows. I'm a Norris fan and he was just so caught in the heat of the moment much quicker and longer then other fighters as shown when he hit Curry when he was going down and Leonard when he was down.
I think in the heat of the moment, it's easy to let instinct take over. I don't any of these fighters meant to throw an illegal blow, and unless any of us have been in the ring, I suppose we'll not understand what it's like. You're pumped up, high on adrenaline and looking for the kill.... yet have a split second to make a decision to throw a punch or not. Abrahams last night looked bad in slow motion, but when you watched it in real time, it didn't seem that late. However he's not the first, or the last to throw a late punch. It happens, and it always will. It's got to be a DQ though, you can't argue it.