If you’re the mountain biking type then this video will hit the spot. How fun would it be to ride along the rim, to mountain bike Bryce Canyon? I think the real fear or danger would be getting preoccupied with the view and then finding yourself heading straight over the handlebars.
The risk is worth the reward in my opinion. Riding a trail like Thunder Mountain in Bryce would be a trail you would not soon forget, creating memories that would only grow better with age.