There's a clip from “Twyla Moves,” the PBS American Masters episode about Twyla Tharp, of Tharp rehearsing with dancers in Central Park. It's from 1969: They were wearing regular street clothes, kicking and turning, throwing their bodies up and across, down and around as baby carriages, football players, and police on horseback meandered through them. Indifferent towards aesthetic perfection or public perception (not to mention whether or not their sneakers got stained), the dancers launched themselves through the park, falling and flying to the point of exhaustion.
Twyla Tharp's “In the Upper Room” at City Center. Photograph by Christopher Duggan