Pot commited or clear fold?

[minwoo]

$33 Party. 640 entrants. This is the FIRST hand of the tourney

#Game No : 2309450143
***** Hand History for Game 2309450143 *****
NL Hold'em Trny:13650143 Level:1 Blinds (10/15) - Monday, July 04, 17:00:14 EDT 2005
Table Multi-Table(382419) Table #26 (Real Money)
Seat 3 is the button
Total number of players : 10
Seat 1: DBBR2 ( $1000 )
Seat 2: MlNWOO ( $1000 )
Seat 3: steff79 ( $1000 )
Seat 4: Bowbndr ( $1000 )
Seat 5: Yaros4ever ( $1000 )
Seat 6: johnson68 ( $1000 )
Seat 7: Tedi72 ( $1000 )
Seat 8: Turk41 ( $1000 )
Seat 9: adidas1256 ( $1000 )
Seat 10: kenhowell ( $1000 )
Trny:13650143 Level:1
Blinds (10/15)
** Dealing down cards **
Dealt to MlNWOO [ Ad Kh ]
johnson68 raises [50].
Tedi72 calls [50].
Turk41 folds.
adidas1256 folds.
kenhowell folds.
DBBR2 folds.
MlNWOO raises [175].
steff79 did not respond in time.
steff79 folds.
Bowbndr folds.
Yaros4ever folds.
johnson68 calls [125].
Tedi72 calls [125].
** Dealing Flop ** [ Qh, Kd, Qs ]
johnson68 checks.
Tedi72 checks.
MlNWOO bets [325].
johnson68 folds.
Tedi72 calls [325].
** Dealing Turn ** [ 9d ]
Tedi72 checks.
MlNWOO checks.
** Dealing River ** [ 3h ]
Tedi72 bets [350].
MlNWOO ?!

I never know what to do here. I probably would have called on the river if he just went all-in. But that 350 bet really scared me. But then again my check on the turn could have triggered him to make the bet on the river. I probably should have just went all-in on the turn if I was going to call any bet on the river, right? Oh, I checked on the turn because I thougth he had a Q...duh [img]/images/graemlins/laugh.gif[/img]

What do you do on the river and how could I have played it differently/better? I don't really care if he had the Q or not, but I feel like I played this hand poorly, and it left me with a tough tough decision on the river.