Teaching and showmanship

Whenever I am giving a lecture, I have a strong sense of putting on a show. I don't have to force myself to act; it comes naturally. I naturally talk in an enthusiastic and dramatic way; I naturally have all kinds of expressive facial expressions; and I naturally tell jokes and make students laugh. Indeed, for me all this is part of the fun of teaching. How well I performance usually depends on the reactions of my audience, i.e., my students. If I feel that they like my performance, I will perform even better. And I enjoy meeting the challenge of answering students' unexpected questions offhand. Teaching has to have some improvisation elements to be lively and exciting.