I think it requires some skill, nerves of steel, and perhaps a death wish?
For a good motorcycle rider, I don't think it would be too difficult. The hard part is being able to not let the sheer drops on each side make you loose your focus.
Kind of like walking a tight-rope. If you can easily walk a tight-rope that is 2 feet off the ground you should be able to walk a tight-rope 200 feet off the ground....The trick is to just concentrate on walking the tight-rope and ignore how high you are....but for most people, that is easier said than done....and that includes me. :grin:
...Rich