Chamu Rolls Over

Four days before Chamu turns 4 months old (young?), he rolls over on his own. He has been trying this new found technique since last week but always got stuck when his heavy big head kept him from rolling over. We'd come to rescue when he started to fuss. Last night we decided to let him try. After being stuck for a couple of minutes, he rolled over and slowly moved his arm from underneath to front to prop his head up! He also accidentally rolled back to face up (we called it an accident since we suspect it was more of gravity pulling his head than his strength). Ever since then he has been rolling everywhere: on our bed, on his play mat, any chance he got!