"Where does your hidden smile lie?" = film-makers Straub and Huillet locked in deep process in the editing room. the arguments & ruminations are over apparent minutae, which always spills over into core stuff. spilled milk becomes the flawed dairy industry, or so this metaphor goes.
it's illuminating to watch old friends/collaborators spar in such confines and oddly reaffirms our often-frustrating 5-way-fwoe-process. maybe we are not such knuckleheads afterall.