Kelly Bishop walking off the stage during a performance of A CHORUS LINE?
Hard to confirm if this is true. I think I remember reading about the incident in a book but I can't figure out what book it was. I just did a search online and the only reference I could find was a BWW post in 2009 which quoted the following from a now-defunct online source:
After almost a year and a half in the show, Kelly asked the producers for a raise, which they refused. Colleague Justin Ross said: "It was nothing unreasonable; she had been doing the show a long time and just wanted a perk. They refused her, and she became preoccupied with it. She stepped forward to begin her monologue, and suddenly said, 'Zach, I have to leave. I can't talk to you any longer. I'm sorry.' Joe Bennett, who was playing Zach, said, 'Sheila, if the light's bothering you, we can change it,' to try to get her back into the lines. She paused at the proscenium and said, 'I have to go. I'm sorry,' and exited. Thommie Walsh, who was close to Kelly on and offstage, said, 'Zach, I think I better check on Sheila,' which left two gaping holes next to each other on the line. No one had any idea that this was going to happen, including Kelly. Zach cut to Kristine, skipping 'At the Ballet,' and you could hear pages flipping wildly in the pit. After that, Sheila didn't exist, and some of her lines were given to other people.