Schlesinger’s camera . . . situates Joe and Ratso in one of the truest versions of New York City ever seen in a Hollywood movie to that point. And while they deploy a whole bag of sixties tricks—a journey into vérité at a happening, flashbacks, head trips, and dream sequences, an occasional hallucinatory use of black and white—the film is at its most effective when it simply observes Joe on New York’s streets.