Here's a hand where I flopped quads and didn't know what to do. I suspect that I blew a chance to win a huge pot, but I'm not sure. I'll do one of those threads where I post a decision and leave people a day or two to talk about it before I post the next one.

My opponent in the hand is Proofrock. I've seen him at 1/2 NL before, he's a 2+2er and a winning player I assume. He lets himself get pushed around too easily IMO, so I've stolen a couple of medium-sized pots from him already this session.

I have 55 on the button and he raises. Re-raising is always an option, but given that stacks are deep and I've already been playing back at him a fair amount, a call seemed clear.

PokerStars No-Limit Hold'em, $2 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($482.50)
UTG ($200)
MP ($289.55)
Hero ($632.65)
SB ($210)

Preflop: Hero is Button with 5, 5.
1 fold, MP raises to $8, Hero calls $8, 2 folds.

Flop: ($19) 5, 5, 9 (2 players)
MP checks, Hero?

I don't know how often he checks this type of flop in a heads-up pot after raising pre-flop, but I get the sense that he doesn't do it very often. I didn't know quite what to make of this spot. Check, bet 1/2 pot, bet 3/4 pot?