there was a disastrous performance of Macbeth at the Old Vic by Peter O’Toole and apparently there was this one part in the play one night where a Servant comes in and should say “Your wife, my lord, is dead” but what ACTUALLY happened was
Servant: …My wife, my lord, is dead.
Macbeth: Well, what about my wife?
Servant: Oh yeah. She’s dead too.
Servant: There’s a lot of it about.