Myself and Calgary bassist Dale James have been exchanging some lengthy and insightful emails with regards to this performance lately:
Dig Ralph Peterson's ferocious drumming and, in particular, how he's able to maintain the energy of this jam for almost half an hour! That's an impressive feat in itself.
I also love Bobby Hutcherson's vibraphone solo and I really dig how he creates a masterpiece, takes a bit of a break and then he's back for more!