In the scene where the pteradactyl is chasing the Mystery Machine down the street, then grabs it by it's taelons you will see something intresting on the road... The road markings are set for people who drive on the left hand side of the road not the right. This is as Coolsville is an American town so they drive on the right, but Australia where the movie was filmed people drive on the left. You will actually see Mystery Machine drive down the middle of the street and not on either side.