I do pride myself on maintaining a family friendly blog here, but this bizarre incident is too shocking to let pass without notice. Go directly to the YouTube video, since you will have to see it to believe it. Truly surreal and almost funny, until you realize that it is an evil Putin trick. According to Mig Greengard, in a comment on one of his blog posts, this was the work of pro-Putin forces out to discredit Kasparov by making him look like a fool. Mig apparently refused to give this more press, however, by making a separate post, though that would have been helpful.
Note: I have corrected my initial post on this subject and hope other bloggers do as well. I have also changed the link. The original video I saw of the event had a misleading translation.