Mark Bernstein on Sleep No More:

This was extraordinary theater, an unforgettable penetration of the fourth wall. It is also extraordinarily difficult. It’s not improv: the story, it turns out, is scene 21 of Woyzeck. You’re acting across from a stranger. A different stranger every night. In a closed room. The rules are unclear, we’ve just started. It seems that anything can happen. And there’s no distance at all; the acting and the sets have to work from the back of the room and they have to work if you’re standing right there, reading the slip of paper someone left on the dresser, feeling the actress stroke the back of our neck.

This sounds really exciting.