It’s two hours before doors and the parking lot of San Diego’s preeminent metal club has turned into a makeshift gym. This is hardly a surprise on a night where Brick By Brick is hosting the World War Tour; all five bands on the bill, from SoundCloud rap opener Trippp Jones to headliner Show Me The Body, play aggro, yoked-up music that requires a great deal of physical stamina and varying amounts of shirtlessness. As I approach the venue, I see Jesus Piece frontman Aaron Heard steadying himself with one hand on the bumper of a tour van, the other doing dumbbell rows with a kettlebell. This part is surprising because dumbbell rows are not an exercise that provides a brief jolt of preshow adrenaline or builds the sort of muscle that pops on Hate5Six videos. Most people skip “back day” – there’s some degree of brute strength involved, but it requires a deep commitment to proper mechanics, precision and discipline. The same can be said of …So Unknown, an album that delivers the most focused ass-kicking you’re likely to receive in 2023.