“One can read now and then in old accounts of journeys that someone sat down in an ancient forest on a tree trunk and that, to the horror of the traveller, this trunk suddently began to move and showed itself to be a giant snake…. As long as the doubt as to the nature of the perceived movement lasts, and with it the obscurity of its cause, a feeling of terror persists in the person concerned.” — Ernst Jentsch, “On the Psychology of the Uncanny” (1906)