A pas de deux from the 1935 ballet Светлый ручей (The Bright Stream), with music by Shostakovich, libretto by Adrian Piotrovsky and choreography by Fedor Lopukhov, re-choreographed by Alexei Ratmansky for the ballet’s 2004 revival. There’s a story behind the ballet, and not one with a happy ending: “A work meant to be light, entertaining, and uplifting had proved the downfall of its creators.”