About 20 years ago, more or less, a member of the audience at The Met committed suicide from the Balcony. It was during intermission in a live radio broadcast. The rest of the Opera was cancelled and that ghost may be there hanging around since.
The Met closed due to COVID-19.
Another member of the orchestra was murdered in a stairwell.
Leonard Warren the great American Baritone died in performanc,
That was a heart attack on stage at The Old Met on 39th St.