There's widespread speculation that she was on dope. But couldn't she have been ill? The cryptic messages from MTC suggest she went into the production with "problems."
Anyone here remember when Debbie Reynolds was in WOMAN OF THE YEAR? One night, she got something called "trans-global amnesia..." and started going up in act one, slurring, forgetting every lyric. Couldn't finish, was lead from the stage disoriented. Eerily similar. The understudy -- who had never gone on for Bacall or Raquel -- finished the show. Deb went back, but the show closed in two weeks. This strange behavior at least reminded me of that. At the time Debbie had a lotta 'splainin to do, and it all sounded bogus. But she was taken to the ER.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling