The dreamtime is the time of creation. It symbolizes that all life is part of one interconnected system, one vast network of relationship and integration between spirit ancestors and the manifestation of reality.
When food became low, Aboriginals would go to sleep at night and through the dreamtime would dream of hunting some form of food. This would set the dream into the manifestation of reality in its own created dimension of time. An agreement would be made with an animal that was willing to donate its vehicle. This would take up to 48 hours.
In present day, through drugs and alcohol their dreamtime has become distorted, which creates a distorted reality where other spirits may enter their created realities.