Rolling Over is Exhausting

This weekend Morgan was rolling on to her side. We knew she was close. Tonight she successfully rolled onto her stomach from her back. Then got mad because she didn't want on her tummy and rolled back over. It may have been a fluke. We then let her continue to play while we ate dinner. After dinner, we came back to the living room to find this....

She apparently rolled back to her tummy and fell asleep. Not surprising after the workout she gave herself. We think we're in trouble.