The following conversation occurred at 1:00am last night. I had taken a nap earlier and so couldn't fall asleep, and John had just come to bed because he had been doing some computer thing (and to be honest I was a little annoyed about it). John had not yet fallen asleep, but he was definitely only half conscious.
Me: I can't sleep.
JJ: Did I hear you? (an inside joke; he's obviously still conscious at this point)
Me: Yes, you heard me. What am I supposed to do?
JJ: (long, long pause....) Do a whole bunch of pull-ups. That'll make you tired.
Me: I can't even do one pull-up! Besides, where am I going to do these pull-ups?
JJ: On a pull-up bar.
Me: We don't have one.
JJ: Should we get one?
He went on in his delusional rambling for a while until I finally saw the futility of having a conversation with him, and I miraculously fell asleep.