Tried to steal...flopped a monster...screwed it up?

[Hollywade]

My opponent in this hand had been limping in with a lot of garbage. I assumed he didn't have much, so I thought a solid raise would take it down preflop. With the blinds and antes and his call, I thought it was worth a shot to build my stack.

Full Tilt Poker, NL Hold'em Tournament, 600/1,200 Blinds, 150 Ante, 9 Players
LeggoPoker.com - Hand History Converter

CO: 15,110
BTN: 25,283
Hero (SB): 25,640
BB: 13,850
UTG: 15,391
UTG+1: 6,168
UTG+2: 57,665
MP1: 21,190
MP2: 49,646

Pre-Flop: (3,150) 5[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img] dealt to Hero (SB)
4 folds, MP2 calls 1,200, 2 folds, <font color="red">Hero raises to 4,000</font>, BB folds, MP2 calls 2,800

Flop: (10,550) 7[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">MP2 bets 1,200</font>, <font color="red">Hero raises to 8,000</font>, MP2 folds

Maybe I butchered this flop; maybe I didn't. I'm not sure. I hoped that my check would make him think I tried to steal and whiffed. Then I thought maybe a big raise would look like another steal. I didn't think there was any way for him to put me on a 5. I guess he probably just didn't have anything and I wasn't going to make anything more.

How would you guys recommend playing this flop? Being OOP made it tough for me to decide what to do.