The Gift's twist ending is just as inventive as it is absolutely terrifying (and pretty gross, let's be honest). In the film, a married couple (Jason Bateman and Rebecca Hall) find themselves unable to shake an acquaintance from their past (Joel Edgerton), whose behaviour goes from socially awkward to straight-up terrifying.
There are even more movies on the list, if you can believe it, so head over to Reddit to see them all!