In October 1969, when Pink Floyd performed "Careful with That Axe, Eugene" at the Festival Actuel in Belgium, the band was at a pivotal moment in their career, having recently released their fourth studio album, "Ummagumma," just days prior on October 7, 1969. This live performance showcased the band's experimental phase, where they began to delve into more avant-garde music and elaborate stage presentations, which would become hallmarks of their later work. The festival, known for promoting progressive rock and countercultural movements, provided a fitting backdrop as Pink Floyd was starting to gain recognition for their innovative sound and immersive concerts. "Careful with That Axe, Eugene," noted for its haunting ambiance and dramatic dynamics, exemplified their exploration of psychological themes and sonic experimentation. This period marked the beginning of their ascent towards becoming one of the most influential bands in rock history.