"Chico and singer Diane"
Two women stage a cat fight during Mazzone's (Chico) Apache dance,
(notice the Knife in her upper left hand. act.)
1) Apache is based on love of two jealous girls for the same man. In Mazzone's act roughness isn't simulated.
2) Above, one misstep would mean broken bones for dancer. Mazzone, as Chico, swings Diane over floor, then lets her fall and spin. Below, fast action camera catches dancer in mid-air. She's got to break the fall perfectly.