Illustrations of how self-gravity changes the maximum gradient direction, extracted from Yuen & Lazarian (2017b). Panel (a): eddies are elongated parallel to the local magnetic field direction. When gravity is absent (left), the maximum change of the velocity amplitudes (i.e., velocity gradient) is in the direction perpendicular to the local magnetic field. Panel (b): the gravitational pull produces the most significant acceleration of the plasma in the direction parallel to the magnetic field, and the velocity gradients are parallel to the magnetic field.