You would think it would be nearly impossible for a public relations firm to get on the Late Show with David Letterman, but apparently dreams do come true.

Capstrat, a Raleigh, North Carolina public relations firm did exactly that by sending Letterman’s producers a YouTube video of the Capstrat team building a mosaic of Albert Einstein out of 2,000 post-it notes. They had to tear down their Elvis mosaic firs, but they got on Letterman when they suggested building a mosaic of Letterman producer Biff Henderson. Watch.