During a trip to the outback, a married couple undergoes a marital crisis, but also experiences bizarre events in which nature seems to be paying them back in kind for every bit of littered trash. Unfolding at a leisurely pace and devoid of cheap thrills, this classic horror flick builds upon fear of the unseen and the gradual loss of certainty.
Not Quite Hollywood: The Wild, Untold Story of Ozploitation! led me to this, especially recommended for aficianados of Antichrist, Picnic At Hanging Rock and The Birds, stream it here: http://veehd.com/video/3459608_Long-Weekend-1978