[ChrisV]

This stinks of a nine to me. Other possible hands are a mid pair (88, 77) or 87, which just made a straight. He must have hit the flop in some way else he wouldn't call with so many to act behind him. I don't see him betting a 6 on the river.

I'd fold because 88 and 77 are a very small subset of his possible hands. Also, the bet amount is suspect. If he just had a mediocre hand, he'd bet small if he bet at all, to get calls from worse hands. And he'd bet a round number. Him betting exactly half the pot implies to me that he's particularly interested in his hand and that he's keen to bet the absolute biggest amount you'll call.

Actually, I wouldn't be that surprised to see a full here. I understand that 69 is a popular hand amongst some players. Some sexual reason I think, not sure exactly what as I'd never associate myself with something so base and disgusting.