I cast a four-foot piece of ice and threw it off a bridge into the Mississippi River. While calving, I filmed the ice falling and crashing through the surface of the icy river. The compressed value scale of the resulting film addresses the presentness of the action and the absence of the mark. What is left behind is an impermanent trace—a phantom of the act that eventually becomes lost as the river flows and refreezes. Only a careful gaze will catch the calving in this land of snow blindness.