The extras that are listed as background artists in the end credits of the film and most of them are named.
The town's football team are called the Dropbears. Dropbears are a fictional predatory creature said to resemble a koala which drop from trees onto human victims. They are generally used as an in-joke on tourists.
The "alien" crop being cultivated is an East Asian fruit called the fingered citron, also known as Buddha's Hand.
When the character Matt is rescuing the cargo of humans, he quotes a line from The Terminator. Hello Earthlings, "Come with me if you want to live." originally said by the character Kyle Reese and repeated in every installment.