Trung Van Nguyen's aggression gets a set to fold

From middle position, Trung Van Nguyen lays out a 4500 raise, the next two to follow, Hiroki Karatsu and a Malaysian player, both call. At the flop , Nguyen c-bets 6500 and gets called by both players. On the turn , more chips dumped in the pot as Nguyen bets 18,000 and both players call. The river , Nguyen fires another bet of 21,500, Karatsu folds and the Malaysian player tank-folds showing set. This shocks the table including Nguyen who returns the gesture turning over his top pair. 

Trung Van Nguyen 255,000
Hiroki Karatsu 60,000
Malaysian player 29,000