Final answer:
Jimi Hendrix ended his set at the Monterey Pop Festival by setting his guitar on fire in one of rock history's most iconic moments, showcasing his showmanship and the rebellious spirit of the '60s.
Step-by-step explanation:
At the end of his set at the Monterey Pop Festival in 1967, Jimi Hendrix famously set his guitar on fire. This act was one of the most iconic moments in rock history, symbolizing the intensity and rebellious spirit of the era. Hendrix was known for his incredible guitar skills and showmanship, and the guitar-burning incident was a climax of his performance at the festival. The audience was left in awe as Hendrix kneeled over his burning guitar, coaxing the flames before finally smashing it to pieces on the stage.