Relax.....the way his question was worded, sounded like he was stress'n about a topic he knew little about.
I believe it would be better for a person that is tasked to teach something that doesn't know how to teach a particular topic, should admit it and tell the "boss", find someone more knowledgable on the topic.
My credibility is more respected when I admit that I'm not qualified to teach something I know little about. I don't try to "wing it" either. I'll seek out a more qualified instructor on a particular topic and have him/her present it to my students.
That way I learn and the students learn.
I say, Renn, stick to what you're good at teaching. Leave the questionable stuff to someone else that knows that particular subject.
(Now I know this is gonna pi$$ someone else off with a wicked response. Relax, it's only the internet!)