My 9mo has just started crying in her sleep. She moves around, gets up on her hands and knees like she's going to crawl, and cries out. We go in to check on her, and find that her eyes are closed and she is still fast asleep during all of this. Most of the time she settles back down on her own after a few minutes, but if it goes more than 5 minutes or so one of us will go in and rub her back and pat her butt until she's calmed. Is she dreaming, having nightmares? Does anyone else have experience with this?