Overbet bluff, NL$400

[wtfsvi]

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

Villain is 28/5/1.3. Seems straightforward and decent, and when he checks behind on the turn I'm pretty confident that means he wants to play a small pot. I haven't been at the table very long, but villain has probably picked up on me being very loose (40/30 or so during the hands I've had at the table.) So he probably thinks I suck.

Just plain stupid? :

Hero ($407.70)
BB ($83.20)
UTG ($550.04)
MP ($353.60)
CO :#A500AF(villain)/ ($713.62)
Button ($367.55)

Preflop: Hero is SB with 8[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img]. Hero posts a blind of $2.
<font color="#666666">2 folds</font>, <font color="#CC3333">CO :#A500AF(villain)/ raises to $15</font>, <font color="#666666">1 fold</font>, Hero (poster) calls $13, <font color="#666666">1 fold</font>.

Flop: ($34) 8[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $25</font>, <font color="#CC3333">villain raises to $50</font>, Hero calls $25.

Turn: ($134) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, villain checks.

River: ($134) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $342.7 (all-in)</font>