When Your'e Happy and U Know It, Turn Around

As of yesterday Sid discovered that turning from his back to tummy and then back again in the same direction can help him travel some distances. His delight on being able to go back from his tummy to his back by himself was amazing. Earlier once on his tummy, he would lie there for  some time and then start hollering till he was put back on his back. But now when he managed it himself, he keeps rolling from his tummy to his back and vice versa as soon as he is laid down .

The thing is he only rolls to his right side, always. He just does not roll to his other side at all. This means once he starts turning he is just rolling and rolling till he is off the mat to the floor. Though its all fun to look at the scary part now is that he just CANNOT be left unattended on the bed for even a second.

And can someone please tell me if its OK that he only rolls to one side and eventually will pick up the skill for the other side too?