First Knight (1995)

Revealing mistake: A horse gallops through a field and you can see a telephone pole.

Arthur: This is my last act as your King. Do not be afraid. All things change. I, Arthur of Camelot, command you now all... To fight! Fight! Fight like you've never fought before! Never surrender! Never surrender! Fight!

Trivia: Prince Malagant describes the oubliette where he imprisons Guinevere as just having "walls of air." This is a reference to the fate of Merlin, who was sealed away in a "prison of air."