In April 1978, when AC/DC performed live at the Apollo Theatre in Glasgow, they were riding high on the success of their album "Powerage," which had been released earlier that year. "Powerage" was notable for its darker and more complex themes compared to their earlier work, showcasing the band’s evolving sound. The live performance of "Let There Be Rock" during this concert highlights their raw energy and stage presence, which were integral to their identity as a hard rock band. This period marked a significant moment in AC/DC's career; they were beginning to establish themselves as a force within the rock genre, leading to their breakthrough album, "Highway to Hell," which would follow later in 1979. The Glasgow show is often remembered for its electrifying atmosphere and is considered a classic representation of AC/DC's live prowess during this formative time in their history.