One Way Pendulum [1965] [DVD]

This film is wonderfully bonkers, incredibly inventive with a small but excellent cast and a plethora of richly absurd lines of dialogue. The characters almost without exception see the peculiarities in their peers whilst being completely oblivious to their own eccentricities and in that sense is a wonderful observation of our own individual failings. It won't appeal to everyone, but if you like the humour of Monty Python, Spike Milligan or, especially, The Strange World of Gurney Slade, you should love this overlooked, and largely forgotten gem.