weak fold?

[DMACM]

Looking at the hand history now I cant believe I let this one go. I guess I figured UTG probably had something decent and would be a coinflip vs me. Easiest push in the world?

Party Poker No-Limit Hold'em Tourney, Big Blind is t150 (4 handed) http://216.119.70.224/converter/hhconverter.pl

BB (t4835)
UTG (t1395)
Hero (t865)
SB (t905)

Preflop: Hero is Button with 9[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
UTG calls t150, <font color="#666666">Hero folds</font>, SB completes, BB checks.

Flop: (t450) A[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">BB bets t275</font>, UTG folds, BB calls t480.

Turn: (t1205) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

River: (t1205) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot: t1205