An avant-garde, two-man show with five horn players, Fusiform Gyrus is like sliding down a long chute. It’s a reckless and even fun adventure, but you’re totally unsure of where you’ll end up. Written by Obie Award–winning Ellen Maddow and directed by Ellie Heyman at HERE Arts Center, Fusiform Gyrus is a meditation on life, death, and everything in between.