The reason why Ron Artest went into The Palace stands in the first place:
8 years already. Damn. I still remember tuning into Jim Rome's show the day after this happened, and the first thing he said was "well, what are we going to talk about today?"
Grantland did a killer oral biography about this a while back...I can't find the link now but if you can find it it's worth the read. I was watching this game and remember the whole thing unfolding. The scariest part was watching Jermaine O'Neal throw a haymaker at a fan who had run onto the court. O'Neal threw a running roundhouse right. His front foot slipped a little and it ended up being a solid but not devastating shot, but if it had connected cleanly I believe he would have caved the guy's face in a la the Kermit Washington and Rudy Tomjanovich incident.