I got out of this one early, and rightly, I think. But, do you have any idea what the other 2 guys could be playing?

Ultimate Bet No-Limit Hold'em, $.10 BB (9 handed) converter

CO ($10.05)
Button ($4.05)
SB ($11.87)
BB ($15.30)
UTG ($5.55)
UTG+1 ($2.52)
MP1 ($15.30)
Hero ($17.05)
MP3 ($10.80)

Preflop: Hero is MP2 with , .
3 folds, Hero raises to $0.35, 2 folds, Button calls $0.35, SB calls $0.30, BB calls $0.25.

Flop: ($1.40) , , (4 players)
SB checks, BB bets $0.4, Hero folds, Button folds, SB calls $0.40.

Turn: ($2.20) (2 players)
SB checks, BB bets $0.5, SB calls $0.50.

River: ($3.20) (2 players)
SB bets $3.2, BB folds.

Final Pot: $6.40

Results in white below:
SB doesn't show.
Outcome: SB wins $6.40.