Leave it to Beaver meets the Exorcist [40s era dance/body manipulation]

It's simply memorizing. Go ahead, start watching. You'll think, "what the fuck am I watching this for" - and then it starts - the freaky body contortions, along with the dance-hall style music - yikes! Combines to form one truly unholy union in this disturbing piece of film. You think I'm joking! Remember the gals really did this - no CGI back then!