16T: Fold after c-bet with second pair gets check-raised?

[Wolfram]

Is this too weak or just right? I didn't have a strong read on villain, though I had seen him raise a bit. Later in the game he revealed himself to be pretty laggy.

PokerStars Tournament, Big Blind is t100 (5 handed) Converter on pregopoker.com

UTG (t1075)
Hero (t1840)
Button (t5405)
SB (t2190)
BB (t2990)

Preflop: Hero is in CO with Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="gray">UTG folds</font>, <font color="red">Hero raises to t250</font>, <font color="gray">Button folds</font>, <font color="gray">SB folds</font>, BB calls t150

Flop: (t550) Q[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] (2 players)
BB checks, <font color="red">Hero bets t350</font>, <font color="red">BB raises to t700</font>, <font color="gray">Hero folds</font>

[digables-]

Against a laggy opponent in a 16, I am getting all my chips in here.

[Wolfram]

Yes, but I didn't have that read at the time. I guess I started watching him more after this hand and then I saw how laggy he was.

And the lag-ness was confirmed in the push-fold stages of the game. I think that being laggy in push-fold late stages is not the same as being laggy in the early game, or in post-flop play.