I have had a look around and have found a web page for Paul Flesher (see Flesher lecture on The Passion of the Christ):
Introducing Paul Flesher
A couple of the links are dead; for one the correct link can be found here: Wyoming Web Lectures on Religion. This is a project to provide full on-line lectures in real-media from key figures like Jacob Neusner and Rosemary Radford Ruether. This is a great idea and has obviously inspired the provision of Flesher's lecture on The Passion of the Christ.
Thanks to those who have informed me that standing to lecture is the norm among able-bodied Americans. Note that his web page provides a picture of Flesher standing to teach too.