unexpected raise from 2+2er

[pickless]

villain is 2+2, definitely a thinking player. I have him at 27/17/2


Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
UTG: $100
UTG+1: $35.80
CO: $96.25
Hero: $99.50
SB: $98.90
BB: $167.15

Pre-flop: (6 players) Hero is Button with 9[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/club.gif[/img]
3 folds, <font color="#cc0000">Hero raises to $3.5</font>, SB calls, BB calls.

Flop: K[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/club.gif[/img] ($10.5, 3 players)
SB checks, BB checks, Hero checks.

Turn: 4[img]/images/graemlins/club.gif[/img] ($10.5, 3 players)
SB checks, BB checks, Hero checks.

River: 7[img]/images/graemlins/spade.gif[/img] ($10.5, 3 players)
SB checks, BB checks, <font color="#cc0000">Hero bets $8</font>, <font color="#cc0000">SB raises to $26</font>, BB folds,

I should have bet flop but I was 8 tabling and not really paying attention blah balh blah.

On the river I decided I wanted the pot when out of nowwhere sb raises.

I don't think he is checking a jack on all 3 streets and if he has 77 that takes huge balls/retardation to check on the river.

I really wanna shove. thoughts???