I had a class with a professor who we’ll call Mr. Titanium during my undergrad. I use this name because the first day of class he told us he had more Titanium in him than a Boeing 767.
Mr. Titanium was one rough teacher. I remember one class where he was able to make a student cry while berating him for having his laptop open...all the while the student two seats over was typing away feverishly on his own laptop.
Even though the class left a lot to be desired, Mr. Titanium did offer a plethora of sage knowledge.