While I was growing up, one of my dad's girlfriends was vegetarian (and had been since she was like 15). One time we went to this indian place that we went to somewhat regularly and she ordered the same thing she ordered everytime, only this time she noticed miniscule bits of chicken in it. Apparently, those chicken bits were part of the recipe and she had been eating them everytime we went there. I'll always remember the look on her face when the waiter told her