It was an form of eclipse, I suppose.
A person sees the doctor and then drives to work. Parks her car and then its knocked down by a car while walking across the road. Motor vehicles in these circumstances are malign. There are broken bones and a head injury. While not at first recognized, it is quickly realized that helicopter flight is necessary to transfer the patient to St George, Kogarah, then there is an extensive operations on the knee – unknown to me at the time.