$114 really weird hand vs Poker_in_PB

[kleath]

Ok never seen(or paid attention to the fact that he did) pb do this before, I have to assume its a big hand but small chance its just cause he's really goofy hence the VERY marginal flop peel, when turn checks through I'm REALLY confused, deciding to attempt a river bluff, thoughts?

[note I just realized my river bet sizing sucks, carry on though]

My basic read on P_i_pb: is a bastard obv, but big multitabling sng tag with some goofy spots/ranges that ive noticed.

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (6 handed) internettexasholdem.com

CO (t1970)
Button (t2035)
SB (t1530)
Hero (t2160)
UTG (t2310)
MP (t3495)

Preflop: Hero is BB with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, MP calls t200, <font color="#666666">2 folds</font>, SB completes, Hero checks.

Flop: (t625) Q[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, Hero checks, <font color="#CC3333">MP bets t200</font>, SB folds, Hero calls t200.

Turn: (t1025) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, MP checks.

River: (t1025) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t500</font>.