When security told him to cool it, he got really belligerent. Started using racial epithets at the guards, etc. They told him to leave. He refused. They called in the cops. You see the rest of it.

Whether or not the tazing was necessary/appropriate, people will certainly disagree. The one thing I can tell you for sure is that this guy had no intention of leaving calmly on his own.

Other things to look out for....

1. 1:25 - another fan accidentally gets pushed down
2. 1:42 - a foul ball lands in the vicinity.

-- video and notes by jdischord