When two bands built on the idea of “heavy music without guitars” share a stage, the result should feel like a novelty. Instead, The Hu and Apocalyptica turned it into something elemental — ancient, cinematic, and crushingly modern. The night opened in near darkness as Apocalyptica walked onstage carrying nothing but cellos and menace, launching into a set of Metallica’s greatest. The Finnish trio reminded the crowd why they remain one of heavy music’s most inventive live ac