Monty Python and the Holy Grail (1975) ending / spoiler
Sir Robin, Sir Galahad, and the old man all fall into the botomless pit of peril. Lancelot makes it across the bridge of death, but is arrested by the police. King Arthir and Sir Buedeviere make it to the castle aaagh, only to find it already occupied by the French. Arthur calls in a huge army to attack them, but they are stopped by the police just as they are charging.
Submitted by DaveJB