The way it actually happened:
The restaurant was busy as hell. The waitress was new, and harried and overworked, and was trying desperately to get to the end of the lunch rush. The more mistakes she made, the more the Deathstar Fat acted personally offended by said mistakes--and her friends grew increasingly embarrassed by her snotty behavior. The waitress ended up in the bathroom, crying.
The manager took over the table because it sure sounded like Deathstar Fat was a raging bitch, and that's where the story ends because Deathstar Fat, like others who tell these stories, is a coward when faced with anyone they can't push around.