Has more musical numbers than any other horror film I've seen before

It has a strange, "something-is-off" vibe throughout, and then the ending is sheer brilliance. Also, Britt Ekland's song and dance was the sexiest thing in any horror film.

A pretty cool film generally. A gritty, intriguing thriller with plenty of atmosphere, a great performance from Woodward, a truly masterful directorial touch and a totally unexpected twist.