Awesome hand, horrible river

[Hince]

The hand pretty much explains itself:

PokerStars 2/4 Hold'em (6 handed) converter

Preflop: Hero is BB with 3[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, CO calls, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (4 SB) 3[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG calls, CO calls, SB folds.

Turn: (3.50 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, UTG calls, CO calls.

River: (6.50 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG raises</font>, <font color="#CC3333">CO 3-bets</font>, <font color="#CC3333">Hero caps</font>, UTG calls, CO calls.

Final Pot: 18.50 BB

Results in white below: <font color="#FFFFFF">
Hero has 3s Qs (four of a kind, threes).
UTG has 6h 6s (full house, sixes full of threes).
CO has 7c 4c (straight flush, seven high).
Outcome: CO wins 18.50 BB. </font>