How is this 2 barrel hand played?

[iheartponeez]

Over 45 hands, villain is 50/16.7/3.75

I've seen him do things like check the turn and then make a huge overbet on the river to fold out 2 other players, but I've never seen a hand like that shown down.

$0.25/$0.5 No Limit Holdem
6 players
Converted at weaktight.com

Stacks:
Hero (<font color="#0000cc">$51.50</font>)
UTG+1 (<font color="#0000cc">$62.70</font>)
CO (<font color="#0000cc">$48.70</font>)
BTN (<font color="#0000cc">$50.20</font>)
SB (<font color="#0000cc">$215.55</font>)
BB (<font color="#0000cc">$24.95</font>)

Pre-flop: ($0.75, 6 players) Hero is UTG 7[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">Hero raises to $2</font>, <font color="#777777">1 fold</font>, CO calls $2, <font color="#777777">1 fold</font>, SB calls $1.75, BB calls $1.5

Flop: 4[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/heart.gif[/img] ($8, 4 players)
SB checks, BB checks, <font color="#cc0000">Hero bets $5</font>, <font color="#cc0000">CO raises to $10</font>, <font color="#777777">SB folds</font>, <font color="#777777">BB folds</font>, Hero calls $5

Turn: A[img]/images/graemlins/heart.gif[/img] ($28, 2 players)
<font color="#cc0000">[b]Hero bets?

Do you fire a 2nd barrel here? For how much without feeling committed? Was calling the minraise a stupid move?