"I had no idea this thing was televised. Boy, is my face red"

In this quote, David Letterman expresses surprise and shame upon recognizing that an occasion or scenario was being transmitted on tv. The expression "I had no idea this thing was televised" suggests that Letterman was not conscious that the occasion was being revealed on TV, possibly indicating that he was caught off guard or unprepared. Making use of the word "televised" also indicates that the event was being relayed live, adding to the unexpectedness of the scenario. The phrase "Boy, is my face red" even more stresses Letterman's embarrassment, as the phrase is frequently used to describe someone blushing or feeling ashamed. In general, this quote showcases Letterman's quick wit and self-deprecating humor.