Like many people, Stephen Colbert noticed that McCain’s speech Friday night was in front of a very green background. Looks like a “green screen” — something TV studios use when they want to digitally substitute a different background behind the speaker. … Are you thinking the same thing I’m thinking? Colbert certainly did, and has issued a Green Screen Challenge. Just download the video footage from the Colbert Nation, create your masterpiece, and upload it back to their site.
