Visible crew/equipment: In the fainting scene you can see in the background on the roofs and in the windows a number of people just watching the shooting being done on the back lot. It is very noticeable in the last wide pull back shot.
Bye Bye Birdie (1963)
1 visible crew/equipment mistake - chronological order
Directed by: George Sidney
Starring: Ann-Margret, Janet Leigh, Maureen Stapleton, Dick Van Dyke
Revealing mistake: During the fainting scene number of the extras can be seen waving and looking at the camera.
Doris McAfee: Randolph, your father's warned you. If you make another bomb, you'll get spanked.
Trivia: The famous fainting scene was filmed over a two days of filming. If you look close clothing on some of the extras changes during the scene.