 Averroes sees the same process in the falling grain of  millet.[14]  Each grain cannot move the air on its own and make a sound. But each grain gives the necessary preparation to the air. When the last added grain passes the threshold and power is complete, the air is stirred and a sound is made. This last part is not stronger than the others, but it definitely causes motion “because of the preparation made in the movable” (LC 336H; LC Schmieja 79:8). Although he does not explain what “preparation” is, we can gather that it is a kind of potential energy. And as for the notion of “complete power”, Averroes seems to intend kinetic energy.