$4.40 NLHE MTT Turbo: What could he have?

[cardriverx]

Full Tilt - $4+0.40 $4 + $0.40 Rush On Demand (#218649131) - Blinds: 80/160 No Limit Hold'em (9 players)
Full Tilt Hand Converter Tool from CardsChat.com

SB: t4,070
BB: t1,290
UTG: t4,700
MP: t2,740
MP+1: t5,182
MP+2: t1,390
LP: t5,925
CO: t5,320
BTN Hero: t8,450

Pre-flop: (t240) Hero is BTN and dealt
2 folds, MP+1 raises t480, 3 folds, Hero calls t480, BB folds

Flop: (t1,200) (2 players)
MP+1 checks, Hero bets t560, MP+1 calls t560

Turn: (t2,320) (2 players)
MP+1 checks, Hero ??

 

[cjatud2012]

What's with your flop bet?

I think I bet/fold the turn, there are too many bad river cards to check it back. If we're called then I think we have to check back the river if he checks to us again.