Are you sleeping or singing?

From almost the time Ryan was born, he has been "singing" himself to sleep. He used to do it any time he was falling asleep. Then he did it only in the car and when he was falling asleep for a nap. Now, he usually only does it in the car when he is tired. It makes me laugh every time and before Ryan stops doing it, I wanted to catch it on video. Finally, I got a chance to get it:

and to answer any questions: no, I was not driving while I took the video; yes, he is always that loud; yes Ryan did fall asleep soon after I turned the camera off; and yes, I am still laughing about it.