A change in circumstances is a bit like the action and the response to taking the flower pot away from its usual place. Suddenly I see all the woodlice scurrying around underneath. Then they disappear into the surrounding plants. Feeling the removal they decide to make big changes so they can be safe again, but without relying on that flower pot just above their little bodies.
The moving woodlice represent the underlying reality which had been covered up by a seemingly permanent inanimate cover, a barrier to seeing.