Excerpt:
"Pulling up at a stoplight in Globe, Arizona, during a spring break sojourn with my family last month, I casually glanced at the hill to my right--where I saw something moving. Craning my neck, I peered through the windshield and saw maybe thirty cattle grazing peacefully on the slope, bunched together in a tight herd.

"In the next instant, the light turned green and I pulled hard on the steering wheel, whipping my head around to look over my left shoulder. I punched the accelerator, shot across three lanes of asphalt, and pulled into a large parking lot. The kids thought this sudden maneuver was great fun--and asked me to do it again. But I was already digging for my camera. A moment later I stood outside the truck's door, snapping photos.

"That's because this was no ordinary hill slope and this was no ordinary herd of cattle."