Monty Python and the Holy Grail

When the mythical king of the Britons leads his knights on a quest for the Holy Grail, they face a wide array of horrors, including a persistent Black Knight, a three-headed giant, a cadre of shrubbery-challenged knights, the perilous Castle Anthrax, a killer rabbit, a house of virgins, and a handful of rude Frenchmen. (official distributor synopsis)