“That night, it didn’t take long for some rather prominent coughing to break out, before the crowd let loose with less subtle forms of protest: boos and catcalls, the agitation growing over the course of the piece’s 15-plus minutes. At one point, an older woman approached the stage, took off a shoe, and banged it on the stage, imploring the ensemble—which included Reich and Tilson Thomas—to stop. Someone else sprinted down an aisle, yelling, “All right! I confess!” Other aggrieved patrons simply left.”