Sitting in a parking lot once in the mountains outside of Denver while my family toured some attraction, I watched an elderly man and women walk to their little red camper truck. Playing with my Mom's camera, I focused in just as he began to beat her around the head, grab her hair and shake her so hard that the little truck was wobbling.
I was a kid. I didn't know what to do. Began honking the horn. Evidently someone must have suspected something because a cook and a couple other guys came out to the parking lot.
The old lady had a bloody nose and her hair was a mess. She was crying. But she refused to get out of the truck and after a few minutes' standoff with the men who'd approached, they drove away.
What can you do?