Humans are recast as spiders in Saraceno’s first stateside solo show, which fills the Shed’s entire 17,000-square-foot McCourt space with two metal-mesh webs suspended inside a 95-foot-long balloon. Throughout the eight-minute duration that guests are allowed inside, they’re free to lie down, roam, and listen to the reverberating echoes that Saraceno deems a “haptic concert.”