20 Most Idiotic Film Twists Of All Time
10. Arthur & The Knights Are Arrested By Modern Day Police - Monty Python & The Holy Grail
The Twist: Arthur (Graham Chapman) and the Knights prepare to storm the grail castle, and just as they begin their assault, modern-day police officers arrive and arrest them for Lancelot's murder of a historian earlier in the movie. A cop pie-faces the camera and the film abruptly ends.
Why It's Stupid: Because it's arguably the cop-out to end all cop-outs. Anyone who watched this movie as a kid was looking forward to an epic fight between the Knights and the French army, but instead this troll ending shows up and ruins all promise of that.
Eric Idle claimed that the original planned ending saw Arthur's knights aided by a flock of swallows dropping coconuts on the French knights, but due to budgetary constraints, they had to opt for this sudden, absurd end instead.
Granted, the ending is hilarious in its own way and fits the tone of Monty Python, but at the same time, it's woefully stupid and extremely infuriating given the potential for an action-packed finale.