Hearts

"Can't call to Mom,
Can't say a word --
You're going to die screaming
But you won't be heard."

In the current soap opera about young Queen Victoria on PBS, there's a scene at an opera house for a performance of Lucia di Lammermoor. Right after the Mad Scene, one of the characters gets up to leave and says "At least I won't have to stay for the second act!" What's the boo-boo?