"The Castle" is funny to Australians because the movie is about ordinary people. They are not rich or stylish, but they are good people. Australians like the idea of "the little Aussie battler", someone who is hard-working even when life is tough. The movie title is named for the English saying, which is said many time during the movie, "A man's home is his castle." The movie also talks about the land rights movement of the Australian Aborigines. Darryl Kerrigan compares his problem to the Aboriginals problems about land. The movie talks about famous Australian Constitutional Law Cases, like Mabo and the Tasmanian Dams Case.