I remembering seeing a product at CES years ago which was sort of like an air bag for walking. You would wear it on your hip like a fanny pack, and if you fell,

I remembering seeing a product at CES years ago which was sort of like an air bag for walking. You would wear it on your hip like a fanny pack, and if you fell, it would expand into a large cushion. I have a feeling this was never released, since I haven't heard about it since. I wonder why. It seemed like a really smart idea. (By "seeing", I mean I saw a video from The Verge, CNET, or some other news organization covering CES. I've never been to CES in person.)