Once upon a time I had an Alfasud.
I left it parked on the drive at my parents with the handbrake on (front wheels as mentioned by sospan.
Unfortunately, the drive was on a slope - I didn't leave the car in gear.
Someone knocked at the door during the middle of lunch...
...the car had slowly drifted backwards, and was blocking the road!
Good job it was only an estate road, and the car did not travel onwards into the opposing neighbours drive and car.
