Ever the opportunist, Pauly Shore has jumped on the Michael Richards bandwagon by trying to create some controversy live onstage. Except Pauly has faked getting his ass kicked by a fan, and released it virally to appear as if it were real. It's not. First of all, these places might not all have security, but there are people who work there. If someone were to jump onstage and just stand there like the man in the video, there would be some sort of effort to throw him off.
Also, Pauly gets up and covers his eye, and then throws down the microphone before walking offstage. If he'd really been hit that hard, hard enough to 'knock him out', he wouldn't have the wherewithal to get up and compose his thoughts like that.
There are more clues, but you should take a look for yourself and see what you think. Watch the video and let me know if you think it's fake or not. You know where I stand on the issue.
Redban.com: Pauly Shore Gets Knocked Out