As anyone who’s experienced a Yak performance can tell you, things rarely go to plan. Or to put it more accurately, there isn’t a plan to start off with. Dispensing with setlists entirely, the trio rely on a unique alchemy of feral energy and weird telepathy to conjure up a force-twelve storm where anything from deranged live-wire blues, dreamlike psychedelia and sprawling prog wig-outs can get dashed against the rocks.