Revealing mistake: When Molly's mother is listening (to what she thinks is sex) outside the apartment door, the handle is shown on the right side of the door. But anytime after that the door opens from the left side. Both doors open on the left. (For some reason Molly has 2 front doors to her apartment).
Look Who's Talking (1989)
1 revealing mistake - chronological order
Directed by: Amy Heckerling
Starring: John Travolta, Kirstie Alley, George Segal, Olympia Dukakis
Continuity mistake: When Mikey is talking about his diaper being wet in the crib there is a rattle to his right which appears and disappears throughout the scene.
Mollie: Grandpa, what's going on?
Grandpa: Look, I'm a hostage.
Burly Orderly: He's not a hostage. He's a mean old bastard! You see what he did to my arm? And he gave the nurse a black eye.
Trivia: Mollie's father was played by Louis Heckerling, father of the film's director Amy Heckerling.