One of the most talked about scenes in Alejandro G. Iñárritu’s “Bardo: False Chronicle of a Handful of Truths” features an a cappella version of David Bowie’s “Let’s Dance” and over 1,000 extras.

In the film, Daniel Giménez Cacho stars as Silverio Gama, a Mexican journalist and documentary filmmaker living in Los Angeles. Silverio finds himself on a surreal journey into memories and dreams when he returns to Mexico after many years away. One sequence sees Silverio in a dream-like state as he ventures into a dance hall. The scene pays homage to the classic clubs of Mexico City in the 1940s.

It all began with production designer Eugenio Caballero finding the perfect location for the club, which needed to accommodate thousands of extras. During Variety‘s Artisans Screening Series, Caballero explained: “There was this big culture of hall dancing, which was very big, especially in the working classes. There was a beautiful shell with beautiful bones. But then, we transformed it into something completely different.”

Joining Caballero was sound editor and frequent Iñárritu collaborator Martín Hernández. He worked to layer in the sound and make it as authentic as possible. “There were 1,660 or plus extras and dancers dancing for us, [and we were] recording all that.” Hernández said. “You can’t beat that reality, because that’s the truthfulness and resonance of the place.”

Caballero also talked about the importance of Siverio’s apartment, which had a super-saturated palette with a lot of sophistication. “The apartment is the heart of the piece,” Caballero said. “There are a lot of ideas to convey… he’s always misplaced. He lives in the States, but he doesn’t feel — even if he has a successful career — he doesn’t feel at home here. But he doesn’t belong to Mexico either.”

Watch the full conversation above.