Depending on your point of view, Luke Meyer's fly-on-the-wall documentary Breaking a Monster is either about the breakthrough and rise of a heavy metal band, or about their capture and taming. The band in question is Unlocking the Truth, comprised of three young, gifted, and black 12-year-old Brooklynites: guitarist-vocalist Malcolm Brickhouse, drummer Jarad Dawkins, and poet-philosopher-bassist Alec Atkins....