An opening night film about a white jazz drummer determined to be the best couldn't possibly work, could it? Yet a tremendous Miles Teller (as the drummer) and a phenomenally foul J.K. Simmons (as his sadistic teacher) jam like motherfuckers in Damien Chazelle's single-minded anthem of perfectionist monomania. They left Park City with the U.S. dramatic and audience awards. You'll leave and want to beat on something. —L.H.