Jabberwocky (1977) - IMDb
Jabberwocky: Directed by Terry Gilliam. With Michael Palin, Harry H. Corbett, John Le Mesurier, Warren Mitchell. A young peasant with no interest in adventure or fortune is mistaken for the kingdom's only hope when a horrible monster threatens the countryside.
Anyone seen this? It's directed by Terry Gilliam - it came out a few years after Monty Python and the Holy Grail, and he really hadn't been established as a competent film director yet. It's often mislabeled as a sequel to Holy Grail (it does reuse a lot of the costumes).
Stretching out Lewis Carroll's poem Jabberwocky into a feature film I don't think was the best idea - the monster is the main driving feature of the plot, but only takes up a little of the story. There are a ton of go-nowhere filler scenes. The humor is also an odd shift - Holy Grail was laugh-out-loud funny throughout, this was more silly and absurd than funny. A few scenes were really brilliant, though.
I might just not like Terry Gilliam all that much. (Some directors I just don't like - Robert Altman being the main one I keep complaining about.) I wasn't too crazy about Time Bandits or Fear and Loathing in Las Vegas. Brazil and 12 Monkeys were good, but I thought they were overrated. I'm only interested in watching Tideland out of sheer morbid curiosity - the script to that one looks like he filmed it on a dare.