"Maniac" is a song from the 1983 film Flashdance that was written by Dennis Matkosky and its performer, Michael Sembello. The original idea for the song came to Matkosky while watching a news report on a serial killer, which inspired gruesome lyrics that he and Sembello expanded upon after finding a 1980 horror film with the same name. When Flashdance director Adrian Lyne grew attached to the demo of the song used during filming, his music supervisor Phil Ramone requested lyrics more appropriate for their story of a dancer and worked with Sembello to produce a new version for the soundtrack. The new recording was used for a scene in which protagonist Alexandra Owens trains rigorously at home.