Corrected entry: When Jack (De Niro) and Greg (Stiller) are racing home from the rehearsal dinner Greg is driving a Mercedes Benz. Each stoplight on the way home he stops to screeching tires. Mercedes Benz has had anti-lock brakes on their cars for many years. It would be virtually impossible to do this in this type of car.
Corrected entry: When Greg is waiting to board the plane at the airport, there's no one else waiting with him. When he's dragged out after his outburst on the plane, the gate is full of people.
Corrected entry: In the scene when Greg is smoking on the roof, he hears Pam's dad speaking fluent Thai on the telephone. Thai is a tonal language, so each sound has a different meaning depending on its tone. Pam's dad is speaking in a monotone voice, so there is no way the person on the other end of the line would have understood him.
Corrected entry: In the beginning of the movie, Greg and Pam get on a plane in order to travel to Pam's parents' house, but they eventually arrive there in Greg's car.
Corrected entry: Greg is going to use the bathroom, but discovers Mr. Jinx on the toilet. He switches off the bathroom light and leaves. However, the light switch is already in the "off" or down position. Furthermore, when Greg "turns off" the light, he just touches the switch, not flick it, but we hear the "click" sound effect and the light goes out anyway.
Corrected entry: In the scene where Greg is getting acquainted with Pam's parents, Jack asks him what kind of car he's driving, and Greg tells him it's a Taurus. However, minutes before, as they drove in, you could see the back of the car and it was clearly a Ford Contour, not a Taurus.