A very effective thriller with strong horror elements, it's a shame this movie did not get more attention at the time and is kind of reserved to horror movie buffs, it really deserves to have a wider classic status. Olivia Hussey (of Romeo and Juliet fame) is very good as the harassed girl in the sorority house, we are with her all they way as she becomes increasingly terrorized. Margot Kidder gives really great comic support, her lines are hilarious and she steals all her scenes. The drunk housemaster is also a hoot, too. It's a pretty boozy movie actually come to think of it.