We were at an outdoor pool Dds3/dt2 was playing happily next to a man and his 2 younger children. I turned my attention away for a moment and when I looked back he was repeatedly slapping the man on his back. The man was really angry. When I went over he said to me something like 'what kind of a child it that!'. The tone of voice and the way he looked at me really made me feel like I had the child from hell. How abnormal is it for small children to hit complete strangers in public places????? I have no idea what provoked him as I was out of earshot and wasn't looking just before it happened.