Leonard Bernstein conducts the “Orchestre National de France” in Hector Berlioz’s (psychedelic) Symphonie Fantastique 5th Movement:Larghetto, Allegro (Songe d’une nuit de Sabbat) in Paris, 1976.
If you have the time, here’s the whole piece played by the Chicago Symphony Orchestra conducted by Stéphane Denève.