The show, by the way, did go on with the plucky actress waiting until the bitter end to seek medical attention.
According to a New York Times reviewer, the play depicts the two, before their fame, as egomaniac knuckleheads.
In the climactic scene Ben, played by Mindy Kaling, clocks Matt, aka Brenda Withers, in the jaw. Kaling got carried away and accidentally connected solidly.
Withers fell back on the couch in a pool of blood and announced, "I think we need an intermission."
She returned to the stage a few minutes later and finished the play, albeit with a nasal tone, The Times said.
Celebrity Families of 2014 [PHOTOS]