Standard Bluff against donk?

[Drag007]

Full Tilt Poker - No Limit Hold'em Cash Game - $3/$6 Blinds - 6 Players - (LegoPoker HH Converter)

Hero (SB): $968.20
BB: $354.20
UTG: $600.00
MP: $1,416.70
CO: $889.85
BTN: $117.80

Preflop: Hero is dealt A[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] (6 Players)
4 folds, <font color="red">Hero raises to $18.00</font>, BB calls $12.00

Flop: ($36) T[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $27.00</font>, BB calls $27.00

Turn: ($90) 9[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $70.00</font>, BB calls $70.00

River: ($230) 4[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets all-in for $853.20</font>

Villain is 29/13 donkey
he called turn super-fast
the river bet is effectively $257