Re: AA Flops a set 1/2NL
You're overthinking this.
This is an easy flop shove. After the flop is minraised (meaning he usually lovesssssssss his hand) and with the pot this big, he usually calls. This time he didn't, but in the long term shoving the flop is the right play. FWIW you still won a reasonably big 1/2 NL pot for a hand that didn't go to showdown.
He likely had a completely naked Ace, like A4 suited etc, and was testing the waters with the minraise. Usually this won't be the case.
You also can't "tank" for five seconds.