I just finished re-watching New Year's Evil for the umpteenth time. The movie concludes with the protagonist, having suffered unspeakable physical and psychological trauma, being swiftly ushered into an ambulance and dispatched to much-needed medical assistance. Only it turns out that her (presumably) psychotic son is in the driver's seat, sporting the same creepy Stan Laurel mask that his serial killer father was wearing when he plummeted to his death moments earlier. The implication is that she is ultimately doomed, and the end credits roll. Obviously we have all seen this clichéd ending before. In the past few weeks I've revisited Hide And Go Shriek and Happy Hell Night, both of which have similar endings. Viewing all of these movies in close proximity to one another has only served to emphasize this common horror movie trope. My questions are: - Where did this often-imitated denouement originate? Is there a particular film that did this first? - What other films employ this specific device? I don't know if this is interesting to anyone else, but I know this forum is the best place to ask.