Why does this seem to always happen with AA?

[JC_Saves]

This type of hand seems to haunt with either KK
or AA for some reason. I called a hand where I thought I was beat and sure enough I was, but on this hand top pair and Nut flush draw this is a no brainer right?



PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">UTG (t1970)</font>
UTG+1 (t1430)
MP1 (t1860)
<font color="#C00000">Hero (t1890)</font>
MP3 (t1360)
CO (t1390)
Button (t1040)
SB (t1100)
BB (t1460)

Preflop: Hero is MP2 with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
UTG calls t20, <font color="#666666">1 fold</font>, MP1 calls t20, <font color="#CC3333">Hero raises to t120</font>, <font color="#666666">5 folds</font>, UTG calls t100, MP1 folds.

Flop: (t290) 6[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets t180</font>, UTG calls t180.

Turn: (t650) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets t400</font>, <font color="#CC3333">UTG raises to t1670</font>, Hero ?