If you are ever invited to be interviewed by David Letterman on the Late Show, and bail at the last minute to "go save the economy", DO NOT UNDER ANY CIRCUMSTANCES turn up in an interview with Katie Couric INSTEAD. Did Ferris Bueller let his dad see him in the cab in downtown Chicago on the day he faked sick and skipped school? Absolutely not. If he had, I assure you Dave wouldn't let him hear the end of it. "It's like we caught him getting a manicure or something!"