In August 1987, when Metallica graced the intimate stage of London’s 100 Club, they were riding high on the momentum from their critically acclaimed album, *Master of Puppets*, released earlier that year. This particular gig was something special—a secret performance under the moniker "Damage Inc." It marked the live debut of the track "Leper Messiah," showcasing their innovative spirit and raw energy. Just imagine, in a small venue, the same band that would go on to sell out stadiums, unleashing tracks that would etch their name into metal history! Also noteworthy was the exclusive performance of "Crash Course in Brain Surgery," a unique treat for the attendees. This gig really highlighted Metallica's blend of heavy metal mastery and their willingness to experiment, adding to the lore of their live performances. It’s moments like these that truly capture the essence of their journey through the heart of rock and roll.