These old boys are loose but tricky

[MRBAA]

Regular stud high game on the commuter train, 1-5 spread, 1-10 on river. It's a four man game and we all know each other well. I've got a live AK heart draw against a loose player who likes to push with not alot (he knows I'm fairly tight and will sometimes fold) but who also respects me and won't generally push on later streets without a hand. He's capable of a naked bluff, though, if he thinks the time is right. Somewhat surprisingly, he's also capable of some fairly big laydowns for the big river bet. On fourth he makes it $3 with an eight in the door, I am the only caller. He makes it $3 again on fifth -- I call. On sixth he pairs his door with another 8, I catch my flush, giving me three hearts on board, including the K. He bets $5, I make it $10 and he calls.

On the river, he checks dark and I...