U.S. Patent No. 3,538,508 (.pdf)
Building off the idea of the courtesy pillows handed out on airplanes, the inventor of this patent had the brilliant idea of making a courtesy pillow that folds in half. In the event of a crash, the folded pillow can be put over the passenger's head, and strapped on under the chin. Gosh, wouldn't that make you feel safe? For some reason I thought that people moved past the idea of using pillows as helmets somewhere between preschool and first grade... I guess not. If nothing else, the pillow helmet could be used as a crowd control device: the passengers won't be able to see all the luggage and body parts flying through the air around them.