I regularly listen to organ music. Few organ pieces are so well recognized as Bach's Toccata and Fugue in D minor, and I would suspect few pieces of music is so feared as this composition, possibly because of its hauntingly beautiful sounds and association with the Phantom of the Opera in which an altered version appears as Toccata and Funk in D minor. Originally the song had no ominous associations, apart from the integral minor key.
To me this is an exquisite piece of music and I love being able to "see" it in this visualization. It helps to show the genius of the piece. Beautiful.