Once dubbed "the rhythm section's revenge" by Jim O'Rourke, On Fillmore is back with their most elaborate work, Extended Vacation. The duo is formed by bassist Darin Gray and percussionist Glenn Kotche, who were originally hand-picked by O'Rourke as the rhythm section for his album Eureka and joined him on several tours and his next two albums. It was in 2000 during a gig at Scott Walker's Meltdown Festival in London while touring with O'Rourke that On Fillmore was conceptualized. Nearly a decade later, the band is stretching the very definition of "rhythm section."