In January 1987, the Beastie Boys were in the midst of their meteoric rise, riding the wave of their breakthrough album, "Licensed to Ill," which had been released in late 1986. This album was pivotal, marking the first rap album to top the Billboard 200 chart and featuring hits like "No Sleep 'Til Brooklyn." The performance captured at the Montreux Rock Festival showcases not only their energetic live presence but also the band's unique fusion of rap and rock, which played a significant role in expanding the audience for hip-hop music. An interesting aspect of this recording is the way it presents the band's dynamic stage presence during a period when they were transitioning from their punk roots to a mainstream rap sound, establishing them as a cultural force in the late '80s and beyond.