NL100: A high flush on paired board. Call?

[AlexB182]

Villain was rather bad IMO, running 35/10/0.79.
I run 19/12.
Anyone calling this river bet cause it looks so weird? Would he make that with a lower, say K high flush? Or with trips? Or with air as a bluff?
Comments welcome!

Full Tilt Poker, $0.50/$1 NL Hold'em Cash Game, 9 Players
LegoPoker Hand History Converter

MP1: $118.15
MP2: $92.55
CO: $40
BTN: $109.35
SB: $114.70
BB: $98
UTG: $176.90
UTG+1: $150.90
Hero (UTG+2): $119.80

CO posts $1
Pre-Flop: J[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] dealt to Hero (UTG+2)
2 folds, <font color="red">Hero raises to $5</font>, MP1 folds, MP2 calls $5, 3 folds, BB calls $4

Flop: ($16.50) 7[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] (3 Players)
BB checks, Hero checks, MP2 checks

Turn: ($16.50) 9[img]/images/graemlins/heart.gif[/img] (3 Players)
BB checks, <font color="red">Hero bets $10</font>, MP2 calls $10, BB folds

River: ($36.50) 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, <font color="red">MP2 bets $36.50</font>