This was totally unprepared and unexpected, as I guess one can hear from all the little imperfections. When we were recording the Nonesuch box ("Rzewski Plays Rzewski"), one day we had some time left over after we had done the day's work. Marc-Henri Cykiert (the producer) suggested that we might try something completely different, just for fun. I happened to have the Beethoven Sonatas with me and winged it. It struck me that Beethoven seems to quote "Bella Ciao" in the finale, so I played with that. After he said "Thanks a lot!" at the end, the telephone rang, calling me home to dinner, and that was that.