Hmmm elderly drivers... Reminds me of a funny story.
I had an elderly driver stop and then REVERSE into me on a suburban road!
He then had the gall to try to claim that I had driven into him.
I had two other people in the car, one of whom owned the car. We were amazed at the whole situation.
Luckily there was no damage apart from some extremely slight scratching. Before impact I did manage flick the car into reverse but I hadn't planted the foot yet and I was checking for traffic (bicycles, as Canning St was immediately behind me).