What do you do if you see a parent berating a child?

I was reading an article “Life’s 25 Toughest Questions ANSWERED!” published on the March 2006 issue of Reader’s Digest. One of the questions is: What do you do if you see a parent berating a child? Answer (in RD): “Take a deep breathe. If you truly believe you can help the situation, approach as someone showing sympathy – not …