by Angelo Muredda A few minutes into Kevin Hegge’s long-gestating She Said Boom: The Story of Fifth Column, a critic calls the titular feminist post-punk act an art band that wasn’t necessarily arty. That sounds like an interesting distinction, but it’s also as far as the idea goes in a doc that almost makes up in enthusiasm what it lacks in depth. Hegge sets a fast pace, and the early history of intellectual centre and drummer GB Jones and lead singer Caroline Azar’s collaboration nicely establishes their dynamic of cryptic rock deity and big-sweatered frontwoman, with plenty of footage of…