You mean top and bottom?

It looks like twin flopped the straight or is on a monster draw.

I don't think he has 98 or 9J, or JJ. 98 is possible but I think he'd reraise ya on the flop. 9J maybe, but I think he might lead into the river or perhaps the turn. I can't see him checking that hand twice to you on late streets.

JJ def no cuz I don't think he would play it that dangerously.

Either he missed and has nothing or you have him crushed.

I'd value bet the river. Say 1200-1500. Don't think he can raise that bet anyways w/o nuts in that spot.