'William Bowen's house in Guyra was famous for a contemporary haunting. Over several weeks, windows were broken, rocks were tossed onto the roof and the Bowens were kept awake by banging on the walls. Apparently one of the Bowen children confessed to tossing some rocks on the roof to scare a younger sibling, but this didn't seem to account for the extent of the phenomenon, especially as these things kept happening even when the place was surrounded by policemen. The Bowen[s] themselves appear in the film and John Cosgrove stars as Sherlock Doyle, a psychic investigator modelled on a friend of Arthur Conan Doyle's'.
Source: Robert Hood, 'Killer Koalas: Australian (and New Zealand) Horror Films'. Tabula Rasa (http://www.tabula-rasa.info/AusHorror/OzHorrorFilms2.html). (Sighted: 6/7/2012)