Frank Zappa's "Dog Breath Variations/Uncle Meat' in a performance by the Ensemble Modern, in Frankfurt, Germany, September 17, 1992.
Frank gives the downbeat and observes the performance, in what was his last professional public appearance.
Currently listening to the new RSD release of Be Bop Deluxe - Live in the Air Age with a bowl of LNF. I have an old copy of this album from back in the day but this one is expanded to include the entire show from the night it was recorded. SO GOOD.