OK so this guy is 3betting the top of his range KJ+ and 88+. In raised pots in general he is pretty passive. I have not caught him bluffing multiple streets although he has called a 4bet with T5s early in the match and bluffed turn with it after flop went cc. It is really hard for me to tell if I think he is capable of a big river cr bluff. That said the reason he checked this river is because he had only 2 seconds left on his time bank so I don't think it was intentional. WHAT THE EFFFF do I do on river??????

Full Tilt No-Limit Hold'em, $1.00 BB (2 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

Hero (SB) ($238.60)
BB ($533.85)

Preflop: Hero is SB with A, A
Hero bets $3, BB calls $2

Flop: ($6) Q, 3, 9 (2 players)
BB checks, Hero bets $4, BB raises to $14, Hero calls $10

Turn: ($34) 7 (2 players)
BB bets $28, Hero calls $28

River: ($90) 3 (2 players)
BB checks, Hero bets $77, BB raises to $488.85 (All-In),