During OPUS 2005, there was a performance by a curious duo known as the Redneck Wizards. Their resemblance to Professors Dowling and Bloodthorne is purely coincidental. Unfortunately, the camera work is not stellar, but it’s the only video of the performance. Also, some crude (though not profane) language is used, so parental discretion is advised.
You can view the video via the Internet Archive.
It is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 2.5 License.
You will need Quicktime to view the video. There are three sizes depending on your connection speed.