code: @Override
  	public void onMotionDown(VerticalMotionEvent event) {
  		
  		if(!scrollDisabled) {
  		
  			int velocity = LinearMotionListView.processVelocity(
  							event.getDirection(), 
  							event.getFilteredOutput()[1], 
  							event.getSensorEvent().sensor.getMaximumRange());
  			
  			int scrollDistance = processScrollDistance(velocity);
  			int scrollDuration = processScrollDuration(velocity);
  			
  			smoothScrollBy(scrollDistance, scrollDuration);
  		}
  	}
docs: {@inheritDoc}