Bad news indeed.
Here's the MSDS for cast iron.
http://www.petersonsteel.com/beta/20044261327360.MSDS%20CAST%20IRON.pdf?LibraryPage=2&document=20044261327360.MSDS+CAST+IRON.pdf
Bad news indeed. I hope you're ready to handle all the extreme dangers next time you cook.
Of course, if you REALLY want scary, try a coated pan ! Or, heaven forbid, PAM !
HAHAHA.
As an aside, most people don't realize that Teflon was actually invented entirely by accident. I don't remember the whole story, but it had something to do with a cooling liquid unintentionally coating the inside of its storage container. That was in the 30's, and some years later it's first real industrial application came when it was used in the development of the first atom bomb.
I believe that even today, it remains as one of the most "slippery" substances known to man. And yes, if you set it on fire, it's toxic as hell.