Here's a GoPro view of mountain bike racer Dan Atherton, who broke his neck in 2010, riding down a treacherous mountain trail.
From the https://youtu.be/DhBPFr3RRso description:
See firsthand what it's like to rip down one of the heaviest downhill mountain bike tracks ever created, through the GoPro view of the creator himself, Dan Atherton. It's why Red Bull Hardline is an event like no other. The long and technical course plays on a variety of disciplines, where incredibly steep and rocky technical sections were combined with a motocross run in and 50-foot gap jump to create one of the most progressive downhill courses on the planet.