how do you like this river fold?

[jjacky]

i had an argument about the following hand (which surprised me a bit because i thought the correct play is rather obvious).

77/0/0,4 WTS 45 0,8 Riveraggro; unknown number of hands

Party Poker 1/2 Hold'em (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Preflop: Crazy is BB with K, K.
1 fold, MP calls, 1 fold, SB completes,Crazy raises, MP calls, SB calls.

Flop: (6 SB) 4, Q, J (3 players)
SB checks, Crazy bets, MP calls, SB folds.

Turn: (4 BB) 7 [color=#0000FF](2 players)</font>
Crazy bets, MP calls.

River: (6 BB) 5 (2 players)
Crazy bets</font>, MP raises, Crazy folds.

Final Pot: 9 BB