Flopped flush and everyone goes crazy

[KeysrSoze]

Party Poker 0.5/1 Hold'em (9 handed) converter

Preflop: Hero is BB with 6[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, MP3 calls, <font color="#666666">2 folds</font>, SB completes, Hero checks.

Flop: (3 SB) T[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP3 raises</font>, SB calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP3 caps</font>, SB calls, Hero calls.

Turn: (7.50 BB) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP3 calls, <font color="#CC3333">SB raises</font>, <font color="#CC3333">Hero 3-bets</font>, MP3 calls, <font color="#CC3333">SB caps</font>, Hero calls, MP3 calls.

River: (19.50 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, MP3 folds.

Final Pot: 21.50 BB

Not sure about 3-betting the turn here. Extra credit if you can guess what SB showed down.