This is one of the more fun sketches, "The Lives of the Cowboys," which I wrote about, the tale of Dusty and Lefty. As it nears the end, and Sara Watkins plays her part as the poetry editor with other dreams, it's fun to watch the reaction of the other singers to her performance. I don't want to say why and give away the joke, but the laughter and appreciation on their faces is thoroughly understandable.
(In this graphic below, that's Ms. Watkins immediately to Garrison Keillor's right. Her solo role hasn't come along yet in the sketch.)
There was a fun aftermath to the sketch, part of which unfortunately got cut out of the on-air broadcast, which was a shame. But here at least is the full piece before that.