Watch on SFlix. Machine Man is a documentary that explores memory through the encounter of two voices: that of the group Cabezas de Cera, which engages in a dialogue with the past through the musical accompaniment of the silent film “México Industrial,” and the voice of Don Rutilio, who, through oral accounts, constructs a memory of his life when he worked as a laborer at the Metepec Cotton Spinning, Weaving, and Finishing Factory, a film portrayed decades earlier by the group that currently provided the music.