Sometimes, it's safer for productions to fake vehicles' movements for stunts rather than put them in real action. So special effects artists will use rigs and gimbals to make them move in place. NAC Effects will put a given vehicle or set on top of one of its six-axis motion bases capable of creating realistic movements of all sorts. Effects for scenes involving cars, motorcycles, pickup trucks, boats and airplanes can be achieved safely this way without risking the lives of the actors or their stunt doubles.
—Anonymous