I not only heard and saw those two minutes, but saw other people's reaction to those 2 minutes, and it was "?". Those two minutes were never explained, and I'm glad they were only 2 minutes. I can never relegate the same importance to those 2 minutes as you. BTW those same 2 minutes were repeated many times; whenever the urge hit.
While everybody reads whatever I post, at times they are primarily meant for one aficionado; some are trying to learn, while others already know. This is like having a discussion with those who are very advanced, and those who are just learning at the same time.
The artist I would pick in regard to seeing his advancement is "Charles Mingus"; he started out advanced. I remember buying an album simply because I liked the art work on the cover, and it turned out to be one of the best albums I ever purchased; it was "Mingus Ah Um"
https://en.wikipedia.org/wiki/Mingus_Ah_Um
Not only was the art work unusual, but so was the title, and I wont even mention the artist. This was in 1960 and it was only released in 59; that means I was definitely up to date. Other aficionados didn't quite know what to make of Mingus at that time. (I laugh when I read how so many thought so much of Mingus at that time) Many said WTF at that time, believe it or not.
This thing called "you tube" is the most fantastic thing for me in my life time. I'm still learning about Mingus; what's so fantastic is that I'm learning what I thought I already knew. I just ran into something new for me, "Mingus at The Cafe Bohemia". By the time I quit learning what I thought I already knew, it'll be time for that final act, and the curtain will come down.
Enjoy the music.