Continuity mistake: When they are playing win, lose, or draw, Sally is trying to draw baby talk, and if you keep your eye on the drawing the baby looks different all the time and has eyes, and then doesn't have eyes, etc.
When Harry Met Sally (1989)
Ending / spoiler
Directed by: Rob Reiner
Starring: Meg Ryan, Billy Crystal, Carrie Fisher, Bruno Kirby
Harry and Sally sleep together, then stop seeing each other for awhile because, as Harry said in the beginning of the movie, sex complicated their friendship. On New Year's Eve, they reunite, and three months later are married.
Audra
More mistakes in When Harry Met Sally
Harry Burns: How long do you like to be held after sex? All night, right? See, that's your problem. Somewhere between 30 seconds and all night is your problem.
Sally Albright: I don't have a problem.
Harry Burns: Yes, you do.
Trivia: Before Meg Ryan was cast as Sally Albright, Molly Ringwald was offered the role, but had to decline due to a busy schedule. Ringwald went on to play the part of Sally in 2004 in the stage version of the movie on London's West End.