Celebrity sightings at music festivals like Hollywood-adjacent Coachella are NBD, but at the more remote Sasquatch! fest, held at the Gorge Amphitheatre in Quincy, Washington, they’re a much rarer occurrence. So when a cowboy-hatted John C. Reilly showed up Saturday to introduce Nathaniel Rateliff & The Night Sweats – and execute some Reed Rothchild-worthy boogie moves onstage – it was an event.