Continuity: When Monty has just dropped off his kids from the fish aquarium, he and Julia are sitting in his car and she starts to cry and they talk. At the end of the talk, there is a tear on her right cheek when Monty kisses her, but in the shot from behind Monty a split second later, you can see her cheek and it is dry.

Other: At the end, during the neighborhood fight scene, Monty is punching Joe, but you can clearly see that he is not actually coming in contact with Joe's face.