AA v AA is unusual, but not terribly rare. I have seen a number of flopped trips, but I'm not sure i have ever seen the board turn quads. I know I have never seen both on the same hand before. I guess rivering an "extra full house" (quads and a pair) on my folded hand was just a little extra tidbit.
As you might expect, I folded to the 3-bet, and they got it all in PF. I have to say I really did LOL when the hands turned up.