Brain, we need to talk. When I have one of those stress dreams about an email (not a real one, an email you made up inside the dream), why do you make me think a bit obsessively about how I should reply to this completely fictional email for far too long after I have woken up? It. Is. Made. Up.
@bsag my brain wakes me up to similar things. It takes something stupid, like the fact that I forgot a comma in an email, and tells me people will read it wrong and get upset over and over until I wake up. Then it says "just kidding!" and not another shred of this stupid thought remains.