Dwight Slade, as featured in the new documentary 'AMERICAN The Bill Hicks Story'. In this outtake, Dwight 'does' Brad and Bill. Dwight was Bill's first comedy partner. They started performing together in the 8th grade, and made their 'professional debut' at the Comix Annex in Houston Texas in 1976 - aged just 15 years old.
More info at http://www.americanthemovie.com