I won't defend his play too much. Just busting out an all-in on that flop is pretty bad, for sure. On the other hand, he was put in a very tough spot. He was certainly going to lose some more money on that hand. It's possible that in that particular hand, with those particular players, etc. that he might have been able to not lose too much.

But in general, if you have AA and the flop is middle-and-paired it's too weak if your general policy is to always fold to any aggression. What if you had JJ or QQ or 99? If he bets half the pot, no matter what you do, he's in a tough spot.

As for making comments -- doing so is fine if you understand the consequences. The only bad one in that situation (besides the longshot of him physically attacking you) is it raises your profile a bit.

But I'm done commenting on the hand -- that was a monster!