A couple months ago, a rather odd (viral) film emerged out of the Icelandic ashes of one Valtari* (XL; 2012), the latest soundtrack-friendly album by Sigur Ros — one of the seminal pre-millennial disestablishmentarian tilrauninas (Icelandic for “experimenters”) that helped define and shape the very landscape of what many music connoisseurs affectionately refer to as “post rock.”