"The Fakir"

I should preface this post with some background.  As far as I know, Argent played "The Fakir" only in live performances and never recorded a studio version.  I have three live recordings:  John Peel's Sunday Concert (14 February 1971), The Paris Theatre, London (14 December 1972), and The Palace Theatre (7 November 1973).  In introducing the piece, Peel comments, "This is, uh, actually not a group composition; it's a Don Ellis thing, arranged by Jim Rodford.  Uh, it's called 'Fakir.'"  At the Paris Theatre concert, Russ Ballard introduces it and remarks that "it's a thing that features our drummer; it's the one and only number that features him," and in his book Banging On!, Robert Henrit explains that "The Fakir" was basically his drum solo (pages 76 and 84).

There's a section in the Paris Theatre version where Henrit beats out a rhythm on the bass drum and simultaneously yells some indistinct words off-mic.  Recently, I discovered what he's quoting here.  A couple weeks ago, I watched the Marx Brothers movie A Night in Casablanca, in which Chico plays the tune on piano and introduces it as "Beer Barrel Polka."  According to this site, it's originally a Czech song called "Škoda lásky," which has many titles and lyrics in different countries.  In English-speaking countries, it's also known as "Roll out the Barrel," and these seem to be the words that Henrit is shouting.

(For what it's worth:  I'm most familiar with the tune as "Böhmische Polka" by Albert Vossen und Seine Solisten.)