I don't know about this. I did not watch the video, but aside from making sure the kid was out of harm's way, why should anyone step in and break it up? About the only time I'd step in to break up a fight is if one side is clearly outmatched and getting his ass handed to him (e.g. multiple people pounding on one person or someone who is on the ground and not a threat but the other person continues to beat on him). Apart from that, if two grown adults want to beat on each other over some real or perceived injustice, and no innocent bystanders are put in danger, let 'em go at it. We're supposed to expect regular people to step in and risk getting their asses kicked because the tried to play hero? I spent a good while in the bar/night club business, so I've broken up my fair share of fights. If you don't do it right, you can cause more harm then good by stepping in, by escalating the situation and having three combatants instead of two. Just dial 911 and let the idiots wear themselves out after a minute or so, and will be too busy sucking wind with their hands on their knees to cause anymore problems.