The secret title of this valediction is, “Watching a bootleg rip of a Blu-ray of Ken Jacobs’ 1963 Blonde Cobra with the subtitles on.” (The very prospect sounds like science fiction to these aging ears, yet here we are.) It’s a typically short scribble, a polluted dream of purity, this time about the greatest nunsploitation film of the American avant-garde, and as usual, it’ll all be over almost as soon as it begins.