I saw this band during the "elsewhere" part of the tour in May of 1974.  They were all STUNNING musicians.  Ruth Underwood who, during what must have ultimately become Echidna's Art, was intent on running around on-stage between a small trap set, a marimba, and a set of tuned cowbells (this release does not need "more cowbell").  "Ladies and Gentlemen, watch Ruth!  All through this film, Ruth has been wondering, 'what can I possibly do to amaze everyone? ' Just keep your eye on her, I think she's come up with the answer."  I love hearing Zappa say that because I can clearly remember just how fascinating it was watching this woman in performance.