Peter Gidal's 'Upside Down Feature' is one of the most important films to have been made in this country. It makes a complex and original foray into the nature of film, and, by extension, confronts its audience with a thorough reappraisal of its ways of dealing with film. I found the film exhilarating, but it's unfortunately necessary to add a rider that if you're unused to this type of film, expecting anything remotely similar to what the Big Boys from Wardour St dish you up. then you're in for a major piece of culture-shock which could mean anger, frustration and resentment.