In my case, it was standing against quite a few people, one professor specifically, who was adamantly opposed to educating a classroom of students on the Harlem Renaissance. As someone who grew up in an elementary school learning all about African-American writers, poets and civil rights leaders, it was illogical to me to not keep that going in college. A college education is an opportunity to learn from and about a broader audience through culture, race and education. I failed my English final because I wrote an entire paper (later paid and published in Citizens in America magazine) about why the literary canon should be diverse. And that English final with a big, red "F" and no explanation was delivered to me from a teacher's assistant who got on an elevator to bring it down because the professor was too cowardly to do it herself.
I couldn't have been prouder to write that paper. And I rehashed that experience as Speech 7 for Toastmaster's.