First Knight (1995)

Revealing mistake: In the raid scene where we first meet Malagant, a four-sided wooden tower is shown on fire, and then it collapses from the damage. However, the tower's front legs don't buckle and as it falls, the burning tower appears to be completely intact -- it has simply been pulled down by ropes that are partially visible from the front.

Prince Malagant: They say this was once the greatest castle ever built. Now moss grows in the hall where kings once feasted, and peasants cart away the mighty walls stone by stone to make shelters for their pigs. Hah! Such is glory.

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."