NL100 6m - Semi-bluff Turn vs Half-stack?

[redCashion]

I've been on a heater recently, and in the past the thing that seemed to derail heaters was some overly aggressive play. Just a line check here, I think it's standard but want to double check. Villain was 40/30/1 and a typical pretty bad shortstack.

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) internettexasholdem.com

Hero ($115.65)
UTG ($61)
MP ($63.85)
CO ($175.95)
Button ($102.35)
SB ($97.50)

Preflop: Hero is BB with A[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises to $4</font>, <font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to $12</font>, UTG calls $8.

Flop: ($24.50) 7[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18</font>, UTG calls $18.

Turn: ($60.50) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $85.65 (All-In)...