I saw the most disgusting thing tonight whilst walking with my mum. A man was shouting at his kid for running off so I looked over and he had a metal bar held up like he was going to smack the kid with it. The kid dropped to the ground and was screaming "no no I'm sorry no!! He grabbed the kids shirt (so hard the kids feet were off the ground) and threw him behind his truck. We kept walking coz we didn't want to stand and stare and we hear this scream and we are pretty sure the guy hit the kid with the metal bar. But did it out of view because he knew we were watching. I felt so sick in my stomach and now I feel guilty that I didn't do anything. But we didn't ACTUALLY see him do anything. What would you have done in this situation?
ETA: this guy was working on some landscaping in the local park hence the metal bar.