The actor who had his car roll back on him?..steep or half steep driveways must kill everyday. I've had cars roll back on me over the many years of changing tires-oil- whatever. Have never had one with running engine roll back on me lucky enough.
I did have my genius dog knock the car out of gear...I also had my floormat stick to the gas pedal backing out. There I was riding the brakes and still moving.
Driveways must kill more people then anybody but me can imagine.
When I see those steep Frisco ones? Its a wonderment at how many stories never made the news. Too embarrassing. If you survive to tell.