2/4: Huh? Tough spot 150+BB deep

[Blizzardbaum]

I've never played with this villain before. I have him at 33/2 over 85 hands, but we'd played only a few orbits together when this hand happened. At the time, I thought the only hand he could have would be 8s9s, but now I think TT was in his range (77 too, but unlikely). But what to make of this ridiculous river bet?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $2/$4
6 players
Converter

Stack sizes:
UTG: $427.40
UTG+1: $400
CO: $631.10
Button: $389.80
SB: $638.75
Hero: $816.10

Pre-flop: (6 players) Hero is BB with 7[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
2 folds, CO calls, Button folds, SB calls, Hero checks.

Flop: 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] ($12, 3 players)
SB checks, <font color="#cc0000">Hero bets $11</font>, <font color="#cc0000">CO raises to $36</font>, SB folds, Hero calls.

Turn: 9[img]/images/graemlins/diamond.gif[/img] ($84, 2 players)
Hero checks, <font color="#cc0000">CO bets $84</font>, Hero calls.

River: 5[img]/images/graemlins/club.gif[/img] ($252, 2 players)
Hero checks, <font color="#cc0000">CO is all-in $507.1</font>, Hero folds.
Uncalled bets: $507.1 returned to CO.

Results:
Final pot: $252

[capone0]

How bout something like JQs or KQs? I dont get the overbet. Seems like a bluff.