Rolling Over

I'm not sure when infants typically do this, but Lucian has been getting really close. He tends to go onto his side or really get his butt up into the air. Two days ago (Sunday 4-10-11) Joe said he turned over while having his diaper changed. I didn't get to witness it :( He hasn't done it since, therefore, I can't believe it until I see it ;-) Though, he has been very close with me watching. Yay.