Everyone has seen the Sarah Silverman and Matt Damon Video
Here's Jimmy's rebuttal that played last night after the Oscars and it's as good as Sarah's.
Jimmy and Sarah are two of the funniest people I've ever seen and it was great of Affleck and Damon to play along. Notice all the cameos in the Kimmel video (Huey Lewis, Mary J Blige, Robin Williams, Brad Pitt, Harrison Ford, Cameron Diaz, Don Cheadle, Josh Grobin, and others)
Very funny all the way around.