That's hilarious. Caliendo does a really amazing job with his impersonations. The Harbaugh one was funnier. But the fact that he was in a pre-school nursery looking room was the icing.
Years ago I saw Frank Caliendo as the opening act for Pauly Shore at a San Jose comedy club. At the time he had maybe three impressions total, with John Madden being his signature one. Apparently the audience was not made up of sports fans as I was the only one saying "this guy is incredible!" Please don't ask me why I was at a Pauly Shore show, I am embarrassed to this day.