Visible crew/equipment: When Groucho enters the rehearsal area, the shadow of the camera is visible behind him.
A Night at the Opera (1935)
1 visible crew/equipment mistake
Directed by: Sam Wood, Edmund Goulding
Starring: Chico Marx, Groucho Marx, Harpo Marx, Kitty Carlisle
Deliberate mistake: Riccardo is a stowaway on the ship, but he was standing on the dock when it pulled away.
Otis B. Driftwood: That's the fire escape. And, uh... that's a table, and this is a room, and there's the door leading out, and I wish you'd use it, I... I vant to be alone.
Henderson: You'll be alone when I throw you in jail.
Otis B. Driftwood: Isn't there a song like that, Henderson?