And, steal my idea, please, a gyroscopic backpack to keep seniors from falling badly, and while we're at it,
Some kind of mini airbag for said seniors. I have been climbing 30 degree rock grades on my ridge here (a lot less lately) and have built up muscles to protect my joints, which seem to be intact after slipping on some of the billion trillion tiny scrub oak leaves here. Others just break their hips.
Why bother? because some day, with luck, you'll need the damn things. Thanks for asking!