J was playing around with him and instead of asking him to stop he tried stamping at his head a few times. I was livid with him, especially when he went upstairs and started throwing his lego around and slamming things around. We sent A upstairs to play around with her dollshouse while we brought him down to deal with him and I told him exactly what the consequences could have been if he'd connected with his dads face, including that if he'd connected with his dads nose a certain way he could have even killed him. I may have been wrong not holding back but I honestly have no idea how to get through to him that his actions have consequences and that lashing out like that is so unacceptable! It really was vicious, no idea how I didn't shout at him.