Rejs (The Cruise) - 1970 - is a notable Polish film directed by Marek Piwowski.
This grotesque black-and-white comedy was created during the Communist regime in Poland and was widely regarded as a mockery of some of the most absurd aspects of the system. The film is constructed around hilarious events that took place during a cruise on a river boat of a group of unfamiliar people. It was shot in a quasi-documentary manner and most of the cast were not professional actors.