Rapid Changes in Earth's Surface
A landslide is a rapid change because all the snow or mud falls in an instant. And you don't have enough time to run nor think.
A volcano is a rapid change because the pressure and gas builds up inside the volcanoand when it's ready to blow it bursts into laza and fire.
An earthquake is a rapid change because with a shake of the plates under ground it moves the earth's surface and causes buildings to tumble.