1. A motorized prosthesis, orthosis or exoskeleton apparatus, comprising: a motor operatively coupled to a lower extremity joint; a power supply for supplying power to the motor; and a controller, connected via motor leads to the motor, for controlling the motor, wherein the controller is configured to short the motor leads upon detection of a loss of power to the motor so as to introduce damping behavior to the lower extremity joint within a range of motion between end-of-travel limits of the lower extremity joint.