I'll never forget randomly picking a business law class as an elective in college and on the very first day of that the professor bragged about being a right wing talk radio host, stated that if anyone ever left the classroom for any reason during class they would immediately be dropped from the course, and went on an unhinged rant about how the Duke Lacrosse case was a Democrat conspiracy against white people.

I dropped the class and took chemistry instead, where I got a professor who looked like a cross between Danny Devito and Wallace Shawn and who showed videos of him setting off crude bombs in the woods as part of his lessons on "exothermic reactions".