House on the Edge of the Park (1980)

A psychopathic perp (David Hess) and his loutish, mentally challenged sidekick (John Morghen) are the unlikely victims of a table-turning scheme in the Italian exploitation classic The House on the Edge of the Park (1980). After crashing a bourgeois get-together, the brutes amuse themselves by assaulting and tormenting the guests. But it’s the sophisticated partygoers who have the last laugh in the blood-curdling finale. Annie Belle, Lorraine De Selle, Marie Claude Joseph, and Brigitte Petronio are the diverse group of dames who let their guards--and their tops--down.