[BTirish]

Well, his play isn't exactly standard here either... these tournaments can be pretty crazy loose.

However, he is raising against your paired J and then raising when he catches another K. That makes it very clear that he must have jacks full beat on 6th, either with K's full or quad K's. Your bet out is obvious with the 3 J's; his raise indicates that he can beat trip J's; your re-raise says "I have the boat"; his cap says "I've got the boat beat." This makes check/calling the river obvious.

But given that he capped on 4th, I would probably bet/call 6th and check/call 7th. It sucks doing that with a boat, but it happens. Unless you know he is a total maniac, you have to credit him for something more than just a pair on 4th.