From the movie "Amadeus". Mozart's Requiem is one of the most well-known musical compositions in the world, and Confutatis is a very good example of much of the musical technique that Mozart used that made him and many other musicians so successful.

Watch Mozart as he insults Salieri by playing his own piece better than he did! On the fly as the brilliant Mozart always did. In all fairness to Mozart though; they did present him with the challenge.