“What I really love is seeing non-dancers, like actors or musicians, move naturally in a live performance. Live, David Bowie had movements that weren’t necessarily choreographed; he was just so in his element, in his own world. When people like that perform and the music just takes over their bodies . . . it’s a beautiful thing to watch.” Choreographer Matthew Peacock shares his unconventional path from starting dance lessons as a teen to performing with Cirque du Soleil and Madonna.