I honestly don't remember much about 2000 Republican primary candidate Gary Bauer, but his backwards tumble at a New Hampshire pancake breakfast is a thing of beauty. I'd give it a 9 in the Pratfall Olympics.
Update: The pratfall is at 21:08. Sadly C-Span Video Library doesn't seem to have a good way to cut right to the point.
In related news: C-Span now has its full video archives up on the Web. The site covers 23 years and 160k hours of video. There's even Book TV, which means you can re-watch your favorite Rock Bottom Remainders live shows.