This is what happens to me when I fall asleep on the couch and attempt to have conversation as I am on my way to bed. You can tell Luke gets a kick out of it!!
me: My head fell asleep. I just cut off the circulation. Like, duh!! Where do you think circulation comes from?
Luke: From your heart
me: (with confused look) Oh, yeah…well, my head really has fallen asleep before.
Luke: That brings new meaning to the term “sleepy head.”