Revealing mistake: When Hallie trashes Annie's cabin and the huge water balloon is about to fall on Annie's head, the camera is at a downward view and Annie clearly steps into the trail of the balloon instead of jumping away.
Revealing mistake: When Hallie is about to pierce Annie's ear, Annie puts the apple underneath her earlobe and Hallie puts the needle in - you can clearly see that Annie's ear already has a hole in it.
Continuity mistake: When Dennis Quaid sees Elizabeth and falls in the pool, its broad daylight, but when she helps him and they're sitting down, its twilight and there are a lot of lights on, but when they see his fiancée they stand up and it's broad daylight again.
Trivia: In the scene when Hallie (playing as Annie) and Liz (the mom) were walking to the photo shoot, they're walking across the street. It goes into a freeze frame while playing 'Here Comes The Sun', that was a Beatles song and the Beatles took a picture in those exact poses.
Question: Towards the end of the movie, when the parents are looking at the wine bottles, they hear Martin and Chessy arrive home. Nick tells Elizabeth "she has a key" - why does Elizabeth back up right away as he said that?