Nothing helps avant garde art go down like a good gimmick, and filmmaker Robert Fenz had a great one. Fenz screened two films Monday at the Harvard Film Archive, each accompanied by live improvisation from the renowned jazz trumpeter Ishmael Wadada Leo Smith. Fenz is a young filmmaker who shoots in black and white 16mm. His work consists largely of urban landscapes rendered in richly composed shots. Unlike structuralist filmmakers, however, Fenz's films also have......