Ok the one thing I can't stand is when I am eating out and I find a hair in my food. I just got back from lunch and was halfway through eating a japanese rice bowl when I found a hair. I'm sorry but that just grosses me out.
I know it is probably a bad idea but I threw the rest away since I lost my appetite for the next ten years. This is another reason to pack a lunch or eat at home, you know what is going on with your food.