I feel pretty comfortable when I do drawing demonstrations for the classes I teach. However, I realize with this painting that I started a few weeks ago as a demonstration for my current outdoor painting class that it's hard to explain what you are doing while you do it!
When I paint in watercolor, it's a deeper experience than drawing. The act of explaining does take me out of the zone where I create somewhat spontaneously. In fact, I needed to work on this painting for about 20 minutes without my students watching because I felt that there were some issues that needed to be resolved and I honestly wasn't sure yet how I would address them. I'd say it's mostly finished now, but I've saved several things that I have in mind that I want to show them..
One day my demonstrations will likely be more polished. In the meantime I appreciate the fact that my students accept my vulnerabilities as an authentic part of the process.