Here is a clip of the Mahavishnu Orchestra performing You Know You Know in 1972.
In this clip, the drummer, Billy Cobham proves once again hat he was one of the greatest percussionists on the planet. The controlled dynamics and energy of his playing in an improvisatory format, the sympathetic communication, the pyrotechnic display without intruding on the other musicians is a supernatural phenomena.
I was a real fan of this band at this time. I followed them from concert to concert across the midwest that year and I cut my long hair off forever.