Here's another performance idea gleaned from last Saturday's Pentathlon at the Cottonwood Riding Club in Littleton, Colorado. The Phone Book Race was part of the Trail class there, but it works equally well as a stand alone gymkhana event.
The rules of this class are simple. The competitors ride to a designated spot, where they must dismount...and retrieve a specific page from a phone book.
With page in hand, the riders remount and check in with an event official. The pair with the fastest time (and correct page) win.
So there you have it--reference photos for a timed event in which grazing is not a serious fault. Woo hoo!