I'm sorry if someone pulls a gun like that in a threatening manner all bets are off. The skateboarder did a good job, to me it didn't look like he instigated it, at one point he tried to skate away from the situation on his board, but that good for nothin stain on society gang banger proceeded to get physical. I know it may have looked bad the beating part, and maybe it was a little excessive, but whose to say if you get off of him that he's not gonna go for the gun, then it turns in to another struggle with could turn deadly. BG ****** off about you disarming him and giving him a whooping could turn bad if you let off of him could turn bad in an instant. and his other friends had every right to jump in and throw a few of their own blows, the gang banger (or wanna be) pulled a gun on them, putting their life on the line. Anytime someone pulls a gun on a human being in a threatening manner like that whether they plan on using it or not is still a threat, you don't know what their intentions are.
I know many of us being gun owners, and most of us on here holding CCW's might have handled this situation differently, but this kid is at the age where he can't legally carry, much less own a handgun so he used the tools at his disposal, his fists.