Grateful Dead Live at Bob Weir's Studio on 1975-06-07 : Free Borrow & Streaming : Internet Archive
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disc 1 ( 46.55 ) of 4 June 7, 1975 1. (x) Crazy Fingers (instr.) (ends with long reverb and then faint studio talk in background (6.56) 2. Crazy Fingers...

Lot of free jazz intensity. Lots of starts and stops. Wildly entertaining.