OK, I'm not supposed to tell anybody who this person was, but I'm allowed to quote what happened. I was fixing a friend's computer, and during our conversation I mentioned that white people are sometimes called "crackers" (I unfortunately didn't know anything about its apocryphal etymology at the time). Anyway, later in the conversation I was spouting some ridiculous stories, that, truth be told, never happened. That's when the friend called me a "stupid, cracker liar!"
And then the friend threw a Totoro plush at me.