Does anyone know the black / white short film, in which a male climbs a few "senseless" steps. up and down again, and then there are more and more stairs and finally the male can not get more out of this bottomless "stairs Labyrinth". At the end of the film, when it finally exhausted climbing a staircase, it remains lying and itself becomes a stair step. Does anyone know how this movie is called? He is to my memory without sound.