WTF Narcolepsy?

Yesterday afternoon I got home from work, and collapsed on the couch, completely out of energy. I popped my iPod headphones in and listened to a book on tape for a while (because sometimes I am too lazy to READ), then dozed off and napped till 7:30. I got up, microwaved something for dinner, and settled in to watch a movie.

But apparently this was too much effort for me, because I didn't get far. At 9:30, exhausted, I crawled into bed and slept till this morning.

When, I ask, did that tsetse fly bite me?