Albuquerque had a case, it wasn't at the big boys but it was still a well known chain where a policeman, his partner must have been there too, to have a witness, but they saw the employee spit on his burger...well, they actually sued the place and got a huge sum back. He sued for emotional distress/suffering.
We were just talking about this case, via the recent Taco Bell in Hialeah story, you know, the girl told the lady they only served Spanish speakers.
I don't see how in the Albuquerque lawsuit, they could actually sue the corporate office itself... if one employee is a jackass, that should be down to the employee, I would think. The fast-food chain must have appealed such a decision.