Party 5/10, waiting until the river to raise donk bettor

[SinCityGuy]

The opponent in this hand is a loose/moderately aggressive donk. I waited until the river to raise. I was a bit surprised when he re-raised, and I just called. Who likes this line?

Party Poker 5/10 Hold'em (9 handed) converter

Preflop: SinCityGuy is UTG+1 with A[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#CC3333">SinCityGuy raises</font>, <font color="#666666">7 folds</font>, UTG calls.

Flop: (5.40 SB) T[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, SinCityGuy calls.

Turn: (3.70 BB) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, SinCityGuy calls.

River: (5.70 BB) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, <font color="#CC3333">SinCityGuy raises</font>, <font color="#CC3333">UTG 3-bets</font>, SinCityGuy calls.

Final Pot: 11.70 BB