Umphrey’s McGee unexpectedly pulled double duty at Bonnaroo this June when a visa issue forced Shpongle to pull out of their previously scheduled late night slot, and thankfully for festivalgoers the band was happy to oblige. While this show didn’t go until the sunrise like previous years, it is 95-minutes of danceable Umphrey’s McGee that’ll keep you going at your desk today now that the band…