Night on Bald Mountain, Galina Shakitskaya, 1998

The environment in which this film was made was as turbulent as its soundtrack.

According to Youtube user Niffiwan:

This was the ONLY film that Soyuzmultfilm released in 1998, and in 1999 they released no films at all. At the time that this film was being made, the once-mighty studio was in its death throes. Its management had become tied to organized crime and the studio's assets were deliberately being sold to enrich the bosses. Hired mafia thugs were being used to keep the employees in line and the police didn't dare interfere. It was a regular occurrence for animators to come to their desk only to find all of the materials gone, sold to the highest bidder. These events are described in more detail in Georgiy Borodin's 2003 article. That was the environment in which this impressive film got made.