There's a Kickstart idea in here somewhere.
Surely someone could develop a 911 alert button that works even in areas of minimal or no cellphone reception. It would provide considerable peace of mind.
When I was riding in Dan'l Boone Nat'l Forest there was absolutely no cellphone reception and few cars. If I wrecked I would have been discovered by the flock of buzzards feeding on my carcass.
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Momento mori, amor fati.