I pretty much have to call this river bet, right?

[KSOT]

Live 2-5 at the good ol' Rio. Villain hasn't played many pots at all over the last two hours.

Dealt Q [img]/images/graemlins/heart.gif[/img]Q [img]/images/graemlins/diamond.gif[/img]6 [img]/images/graemlins/diamond.gif[/img]4 [img]/images/graemlins/heart.gif[/img] in late position. I limp behind a few others. Yes I know... raise preflop. What can I say, I like to disguise my preflop hands so I almost always limp. Reduces my variance, keeps me out of risky cbet situations, allows me to trap better, and suits me just fine. Whatever, moving on...

Flop A [img]/images/graemlins/club.gif[/img]Q [img]/images/graemlins/heart.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]

Checked to me, I bet the pot $30, get called by villain in EP.

Turn 2 [img]/images/graemlins/heart.gif[/img]

He checks, I bet pot $90 he calls

River 8 [img]/images/graemlins/heart.gif[/img]

He instantly bets pot $270... hero????????????!