My favorite experiment was when we filled the bathtub with water and then we had a five gallon Sparkletts bottle—glass—and dropped a little microphone inside the bottle and moved it about the bathtub, maybe bang it a little bit on the side, scrape it on the side. And the microphone is picking up some kind of combination of everything that was coming in that little top of the bottle. It had very surreal beauty, and that sound went in the film. It was so much fun.

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