[Pilket]

An overbet on the river means one of two things: he has the nuts, or he has crap. Looking at his action it looks like he's got 89 and is just trying to call down until the flush draw hits on the turn and he wants draws to pay. The draw doesn't come so he value-pushes with the nuts.

But if he's a solid winning player he could be putting this move on to rep. 89 and bluff you off a pot because he thinks your going to be weak because you couldn't fold aces.

Meh, it's close to me. Flip a coin. I can't fault folding, and I can't fault calling.

Pilket