I watched Imburnal's touched-up, belated visionary pseudo-trailer some time ago. It was Charles Lim Yi Yong's "All the Lines Flow Out" (2011). "Sewer" is every bit tubulated with pipelines and bamboo poles sustaining "high-rise" lacustrine huts, as if the slum was a dismantled pipe organ that hummed a serous indie missa for residents' ill fortune while employing barbed wire for tablature - unraveled crowns of thorns.
A slow-burning, but strong portrayal of poverty in the Philippines. Of disorientation, of a lack of perspectives, but also of daily life. Sanchez certainly has proven to have an eye for the mundane yet significant in this film. More about Imburnal on my website: http://iurl.no/9w4a1