Mule Salad

I have to ride a mule next summer. That, in and of itself, is no big deal since people ride mules all the time, I am told. The problem is I have to ride a mule down a two-foot-wide crack in the wall of the Grand Canyon (approximately 70,000 feet above the canyon floor, based on the videos on YouTube).

Lots of people, including my oldest son and my mothe…