Read this article today. It is pretty amazing what technology can achieve these days!
Blind Student Uses Bat Echolocation to Ride Mountain Bike Trails - Bike Rumor
I think it is great that people who otherwise couldn't are getting out there to enjoy what mountain biking has to offer.
There is no way I could ride a trail with my eyes closed and relying on my other senses. Kudo's to the rider who did. I can imagine that it would be a very exciting and nerve wrecking experience.
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