uhhhhh. xD I think you need to warn the manager about the crazy lady demanding sweet and sour chicken.

Something similar happened to me once. I was working in a B&N cafe (which is basically a Starbucks, but owned by B&N) and this guy came in--in his 20s, so young enough to know better--and was like, "How do you make your chai? Is it with some kind of nasty syrup?" I told him that yes, we did use a syrup, but that it wasn't too nasty. He was then like, "No. That's no good," and he proceeded to tell me various chai suppliers in the area, as if I, a barista at a bookstore, had any authority to change where a large, national corporation bought its chai.