This is from the Class 7 Lectures series where Hubbard completely loses his marbles and continues to rant and rave while the students laugh at him.
Wikipedia cite:
{{cite news | author = weareanonymous4 | title = Hubbard completely losing his mind | url = https://www.youtube.com/watch?v=vd1v7K5CsT4 | work = YouTube | date = June 25, 2008 | accessdate = January 14, 2017 }}
Hubbard completely losing his mind June 25, 2008,
Hubbard completely losing his mind June 25, 2008,