Thank you for answering the question. As a side note tho, these types of teenagers are basically cowards and the injection of only one or two additional adults into the foray quite possibly may have prevented the beating.
Nevertheless, I'd rather help one person being attacked by a group of teenage thugs than stand by and watch it happen and have to live with that cowardice for the rest of my life......
An awful lot of the equation is situational awareness and not placing yourself in the situation where such things are likely to occur. One would hope that an amusement park would be such a place, but surveying the crowd can usually give some pretty clear cues as to the lay of the land. Things have changed over the past decade or two. Drastically. Now there are actions and behaviours at the local malls that were unthinkable not so long ago. So if you go, you go early and don’t hang around at closing time. I suspect the same applied at this 4th of July event. After the fireworks are over, the large majority of the crowd heads home. If you are a straggler, you are a target. Packs prey on stragglers. They single out the lone and the weak. If you have your family with you it is all the more reason to move them on out with the majority of the crowd. (Yes, it’s tough with children and women who are generally not attuned to this - protection is not their function in life - I’m talking animal basics here, no flames needed on misogyny, thank you)
Most people in the real world are remarkably oblivious to threats, and even when our instincts tell us, our primal long dormant base instincts, we tend to brush them off and conform. Yes, this guy should have just grabbed his daughter and got the hell out of there, but even for the sake of defending his own, he now lies probably comatose.
And the animals responsible have been set free.