Ingestion of dry chemical?

So basically, you ate some fertilizers (monoammonium phosphate, ammonium sulfate), rock (mica), baby powder (talc), and a bunch of random dust/crud. The fertilizer part is probably the worst, and the other two are basically inert (unless you breathe it in, which is bad). That "HMIS 1-0-0" indicates the hazard; first number is health risk, then flammability, then reactivity. The 1 in health signifies "Irritation or minor reversible injury possible," and the other two are 0, meaning it won't burn or explode (as you would hope, for a fire extinguisher). So, it's something you don't want to be doing often, but unless you really loaded up your toast with it, you'll probably be fine this time. If you feel weird or worried, call the poison control center or go to the hospital, but otherwise, just don't do it again... (and clean out your oven before you use it).