[A soft rumble passes through the whole ship, followed by a five minute series of short, though quite noticeable, tremors. The very familiar voice of the Admiral comes on.]
Attention passengers, we've passed through some turbulence and may have taken on water, so please be aware of anything particularly unusual about.
(And, the
paranoia flood is a go! Those affected will experience whatever range of paranoia that you picked out for them. This is a short one and will end tomorrow!)