It sure looks like he is inducing a bluff on the river, but he could also have a missed diamond draw. Not to mention when inducing a bluff he may have a better hand. Am I good here 55% of the time when I'm called?
Party Poker 5/10 Hold'em (6 max, 6 handed)
converter
Preflop: Hero is BB with 8[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
<font color="#666666">
4 folds</font>, <font color="#CC3333">SB raises</font>, Hero calls.
Flop: (4 SB) 4[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.
Turn: (3 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">SB raises</font>, Hero calls.
River: (7 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks