Good fold with KK on river here?

[n4rf]

Villain is unknown, just sat down

Full Tilt No-Limit Hold'em, $0.10 BB (6 handed) Full Tilt Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($12.70)
Hero ($19.75)
Button ($10)
SB ($10.05)
BB ($11.05)
UTG ($9.85)

Preflop: Hero is CO with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, MP calls $0.10, <font color="#CC3333">Hero raises to $0.45</font>, <font color="#666666">1 fold</font>, SB calls $0.40, BB calls $0.35, MP folds.

Flop: ($1.45) 9[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $1</font>, <font color="#CC3333">SB raises to $2</font>, BB folds, Hero calls $1.

Turn: ($5.45) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $2.2</font>, Hero calls $2.20.

River: ($9.85) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $5.4 (All-In)</font>, Hero folds.

Final Pot: $4.45

[TonyRoflmao]

Just shove the flop.

[dlorc]

Call and get shown AK/AQ/QJ/JJ/QQ.

Seriously what are you putting him on here?

99/AA/TT?

You're getting 2:1 and ahead of most of the range of an unknown 10nl player.

[n4rf]

Check the flop, min raise... he's not doing this with a 9 and the flat call preflop didn't make me think big pair