Body Double (1984)

An out-of-work actor sublets a house from a new friend and, boy, what a view the place has. At midnight, the woman across the way does a masturbatory dance “like clockwork” and the actor is happy to serve as her faithful audience. He sees her being slapped around and robbed and gets protective, but things don’t go well and he wonders if there’s something more going on.

There could be a solid thriller here, but it’s buried in softcore porn, a ridiculously annoying main character, and general ‘80s-ness which basically turns it into laughable trash.

D+