I went to check on Kyle last night around 11pm. I noticed that it was a little stinky in the room. Although I normally wouldn't change him in the middle of the night, I decided I didn't want him sleeping in a stinky diaper for 9 more hours. I got him out of the crib and laid him on the bed to change him. In a sleepy, not quite awake voice, he said "Toot". Toot is the word we use when he farts :). Apparently, he was letting me know he had, though he never did wake up.