Mary gripped the dash board of the car in front of her.  As you brought the car to a sudden stop.  The ground once again beginning the shaking.  As secondary earthquakes not hit.   This is usually the pattern of them hitting.   Their may be a third and even fourth one hitting, before it finally all finishes.<br/><br/>She is not sure that driving in the car was all that good of an idea before the tremors finally subsided.