what would you do??

My child hood friend Mary and I get to together every couple of months to catch up since we are both super busy with our every day schedules. Usually we meet up at night once the kids are asleep and enjoy a dessert at a near by restaurant. Recently we got together at FLIPS the sports bar and grill, it was late..I'd say about 9pm (thats late for us) when we got there. We ordered some cake and started on our catch up chat, the place wasn't too busy but it wasn't empty either. Near by was a table with a dad, mom and little boy that was about 6 or 7yrs old. Mary and I could help but over hear the dad yelling at this little boy for no apparent reason, I had a clear view of their table but never saw this little boy act up in any way. The place was filled with t.v.'s so I only heard some of his louder comments like "SH**, what are you doing?", "wait till we get home!" and other things were said that I can't exactly remember. The little boy was playing with a cell phone and didn't seem to be bothering them, maybe he was asking for help with a game, I'm not sure. I kept looking and telling Mary that I felt like I was on the ABC show "WHAT WOULD YOU DO?". I seriously was looking for camera men and thought I should do or say something. Have yall seen that show? I love it, Craig says it was made for me because I'm so nosey and always over hear weird situations. Here is a link to the show http://abc.go.com/watch/what-would-you-do/SH5555951?cid=google_news_sem. The mom at the table gave the dad a few looks and told him to be calm but that was it, I just felt bad for the little boy. Every time the dad screamed other tables turned and looked at them, I was worried for the little guy when he got home. Mary and I agreed that as a parent we wouldn't want someone telling us how to train or correct our own kids so we just sat and in my mind I quietly said a prayer for the son.