Hey...OP here. So in this theatre there are two curtains. The second one (more up stage, away from the audience) has been broken. So we just open both curtains, since the second one never opens. We perform in front of it and it's no big deal. We get some great lighting off it really, and once we had someone stand back there and shake it and looked cool. Someone fixed the second curtain without telling us. The actors were having sex behind the "broken" curtain and it opened. No one told them to stop because they were quiet, and no one wants to tell people to quit having sex... So anyway, there it is.