JTs flops trips but I fold to a river 3-bet

[Chris Daddy Cool]

Good Mirage 10/20 game. pretty loose, not very aggressive and bakku is sitting to my right.

i'm utg and limp J [img]/images/graemlins/heart.gif[/img]T [img]/images/graemlins/heart.gif[/img], a MP player raises. He coldcalls a lot, but I havent' seen him raise yet, which probably doesn't really mean much. the blinds fold. anyhoo i call and it's heads up.

flop: J [img]/images/graemlins/club.gif[/img]J [img]/images/graemlins/diamond.gif[/img]5 [img]/images/graemlins/spade.gif[/img]

I check. He checks.

turn: 9 [img]/images/graemlins/heart.gif[/img]

I check. He bets. I call.

river: 2 [img]/images/graemlins/club.gif[/img]

I check. He bets. I raise. He insta-3-bets. I fold.