In the patent, published by the the United States Patent and Trademark Office USPTO , Google said that if the car is able to hold the pedestrian and slow down, it will reduce the amount of damage to both parties.
Google uses an adhesive coating on the bonnet to make the human stick, which wears off once the car slows down.
Ideally, the adhesive coating on the front portion of the vehicle may be activated on contact and will be able to adhere to the pedestrian nearly instantaneously, said Google in the patent application.
This instantaneous or nearly-instantaneous action may help to constrain the movement of the pedestrian, who may be carried on the front end of the vehicle until the driver of the vehicle or the vehicle itself in the case of an autonomous vehicle reacts to the incident and applies the brakes.
As such, both the vehicle and pedestrian may come to a more gradual stop than if the pedestrian bounces off the vehicle.
Most have been human drivers fault, though one video shows the Google car definitely in the wrong, crashing into the side of a moving bus.