In the kitchen, Allison accosts a passing Josh, asking again why he's so mad at her. He's totally not into it, saying that it doesn't matter because she's leaving anyway. He finally closes the discussion by saying, "I've got nothing else to say to you." Way to flip him, Allison.
The houseguests get a letter, which Sharon reads to them all in the living room. Basically it tells them that if they hear this sound [loud alarm klaxon], they are to meet in the living room immediately. Everyone freaks out like this is going to totally change the game somehow. Sure it will. Expect the unexpected! Or expect another Jericho cross-promotion. Whichever.
In the HoH room, Josh and Sharon and Natalie and Matt hang out, worrying that the siren might somehow mean the revocation of Matt and Natalie's veto, or gives Allison some kind of immunity.
While out playing pool with Matt, Ryan is optimistic about the siren, saying he's got nothing to lose as far as any twists in the game go. Allison, meanwhile, theorizes to Natalie that a change is in the air.
Matt and Natalie go to contemplate the memory wall, like they have to think about whether to use the veto in the impending meeting. Which begins now. Matt and Natalie give Ryan and Allison a chance to speak on their own behalf. Ryan advises Matt and Natalie to use the PoV on themselves, and they are happy to oblige. So Joshuah gets up and nominates Sheila and Adam for eviction. They take their places next to Ryan and Allison on the couch.
Adam swears he'll freak out if he gets backstabbed. Sheila is sick at the thought of leaving the house. And Alison says she's been through a lot of situations in her life, and is a survivor. And the swath of people in her wake who used to think she was a lesbian? They're just weak.