Murder-Rock: Dancing Death (1984)
w/Olga Karlatos and Ray Lovelock, directed by Lucio Fulci.
A series of murders rock a dance academy in New York in which the mysterous directress, Candice, sets out to find the killer… - imdb
giphy.com, youtube (Tobius Berger, Otto Rivers), videozetaone.com, hysteria-lives.co.uk, dvdbeaver.com, cinematicshocks.com, giallo-fever.blogspot.com