If you read the story, and see the video, no one pulled a gun on a snowballer. A bunch of whiny twenty-somethings got the story messed up in their heads.
It does have a lot of that "Henry Gates" feel. Seems everyone needs a little Time Out in the corner...
The guy "with a gun" was a plain-clothes detective - on the video you can see he didn't ever go for the gun.
The video didn't seem to show much of anything.
Merely exposing a weapon in any way is "brandishing", a felony in some areas. It doesn't matter where it's pointed. Something to consider in the self-defense firearm threads...