We play the two bodies that she's in in the movie as having a different weight -- each one having a different weight. For the first body, which I refer to as ‘the doll body,’ which is a body that Ido, her father, had built for his daughter who had been paraplegic. She was a human. So he needed to build that at a light enough weight where she could move, and move naturally. And that's what he did. And that's what Alita enters our story with. When she goes to the Berserker Body, that's a much heavier body. And, Alita and her strength, she's able to carry it and carry that weight, but it's something that was more important for Rosa Salazar to understand and come to terms with as an actress. How was she performing that? And I think that's what she did an exceptional job at.