Revealing: When the man holding the poodle leaps to his death, as his body smashes against the car, you can easily see that the poodle in his arms is just a stuffed doll, based on the way it bounces and moves.

Revealing: When Dae-su enters the room of one of his nemesis, his computer screen shows information about the stock exchange. The Internet address on the screen is: C:/DocumentsandSettings/[.]/OldBoy/[.], which would be a link to a folder on that computer, not an Internet address.