Pocket 9, villain goes crazy.

[Ranger_Trivette]

Villain is 24/15/3 over 350 hands. I have not seen him get out of line yet, but he has been losing some pots at the table fwiw.
I did not know what to make of this, so I called to reev turn.

SB: $156.84
BB: $58
UTG: $98.38
Hero (MP): $171.29
CO: $100
BTN: $105.16

Pre-Flop: 9[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] dealt to Hero (MP)
UTG folds, <font color="red">Hero raises to $4</font>, 2 folds, SB calls $3.50, BB folds

Flop: ($9) 2[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $7</font>, <font color="red">SB raises to $21</font>, Hero calls $14

Turn: ($51) 8[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets $38</font>, Hero?