60 to 0 in 5 seconds

Um, wow. One minute Elena's zooming around coloring in her little notepad. I go and IM a friend. The next minute, she's passed out asleep on the recliner. The surprise is still hitting me. She never goes to sleep by herself except for in the car. Granted, it's a couple hours past her normal nap time (she opted NOT to have one today). But... wow.