Awesome Music: Despite being no Fabio Frizzi (Who scored Zombi 2 and the first two films in the "Gates of Hell" trilogy), Walter Rizzati does a pretty good job creating a melancholic and haunting tone.
Although that scene seemed to have been a foreshadowing of Ann's death and was a vision Mae was having.
The zombie who killed the girl in the first scene. He never reappears and Freudstein's ability to create other zombies is never even alluded to later on.
Complete Monster: Dr.Freudstein, an expert in the field of human cells and mitosis, began performing experiments on living people to further his work. When he discovered a way to use body parts to regenerate blood cells and make himself immortal, he killed his wife and daughter, and went to live in the basement of his home, murdering anyone who came into his house and using their bodies for materials. 150 years after he killed his family, Freudstein still lives in the basement as a rotting, zombie like being. When a new family moves into his house, he begins targeting them, and after killing a babysitter and a neighbor, he manages to kill the husband and wife, with their son, Bob, barely escaping. A cruel, selfish man who would cross any lines to get what he wanted, Freudstein had a soul that matched his decayed appearance.
It Was His Sled: Anyone who knows anything about the movie or Fulci's work in general, knows about Dr. Freudstein.