Conversations in his Sleep

Last night my husband was asleep long before I was..  As I settled into my pillow for the night, the following conversation took place: Sam:  so you don't want a corner table. Me.. No.  Why would I want a corner table? Sam... They're easier to protect Me... Protect from what? Sam... You know, from bad guys. Me... I have no idea what you are talking about.  What do you mean? Sam... We need to protect...um...you know... The writings.... Me...what writings?  Are you awake? At this point I think he woke up and realized he had been talking in his sleep, but he still talked about sitting at a corner table and a protecting something from bad guys.  I just started laughing.   Today I asked him about it, and he said he vaguely remembers some of the conversation. He said he has been listening to a book on tape about protecting the vice president from assassains. I think that is what sparked this unusual conversation.