When Brian Costello is interrogating Nora McPhee at her school she is walking away from him in an empty gymnasium. She stops standing on the green floor of the free throw lane. The shot cuts and she is suddenly standing in a different position on the court not on the green floor area before she turns around to face him.
After a dinner, Max lights a cigar but it never fully ignites. A moment later, the cigar has half an inch of ash at the end.
When Nora McPhee drives home on the motorcycle with her son and parks, she leaves the ignition on, as evidenced by the brightly glowing taillight that will turn off and on with the ignition switch.
Near the end, when Matthew's character hits the baseball, he, the catcher, and the umpire are all looking in different directions of the path of the baseball.