At work today, I had a situation where my boss accused of something that was not my fault. My colleagues agreed as much and tried defending me but nonetheless, he began yelling at me. I got so anxious that as I was trying to defend myself, there was no coherence in what I ended up saying. I am usually eloquent and charming, as people have noticed, but I seem to notice that when I'm met with confrontation, all my language training just goes offline and if I try to talk my way out of things, I look really, really silly. I want to learn how to keep my cool and maybe even talk smack when I am under fire. What would you advise I do?