Rolling over already

My son is amazing, He was able to hold his head up from day one, and at four days old he rolled over! Ok, so it was from his stomach to his back but still, what 4 day old baby does that? I thought maybe it was a fluke thing and he would never do it again, but almost a month old now and he continues to do it every time I lay him on his stomach, it's the cutest thing because he is so little and can hold his head up so well!
Brandon and I can't believe how much he has already grown, these were taken when he was 3 1/2 weeks old.
So stinking cute!

And he is so good, I think he is kinda smiling in this pic.

Here is some footage of him rolling over.