sleep moving?

So I put William down for a nap on the floor in one of the bedrooms at the home I babysit at. And I did know he wiggled a lot while he slept, but this just shows how much he moves when you give him the room to do it! (his crib isn't big enough for him to do this!)
START:
FINISH:
And there you have it! My son is really good at moving in his sleep!