I remember seeing something about a libel lawsuit that happened in the past involving some good-bad play and a journalist based in New York who wrote a scathing review about it. When the case was brought to court, the judge supposedly asked the actors in the play to perform it in front of the jury, only to find that it was actually as bad as the journalist claimed it was.
I can't remember the name of the lawsuit, though, and have been unsuccessful trying to find it. I'm hoping someone here knows the case I'm talking about, or if it's just an urban legend.