The intercom in every room starts up, and a regular male voice speaks out.
"I hope you're reawakening hasn't upset any of you in the slightest bit. To avoid any future mix-ups, your "real body" is dead, but a clone of you, or YOU currently are alive.
So yes, in a sense, you are dead men. Try not to be too shocked, please. Really, life in the vault isn't that bad. All of you are assigned to the sleeping chambers, in which you will have to pick out your own bunks.
Good day, everybody."