S.K.
Hi, S.,
This same thing happened to my son when he was around 8 months. It lasted about 4 weeks. There was no consolling him. He would scream, roll around, arch his back, fling himself all over the place, climb around, etc.--all while still asleep. We could not wake him up. It also happened to him early in the morning--around 4:00 usually. It was exhausting for us, but he was always happy and well rested during the day. Then it stopped as quickly as it started. One thing I noticed is that he night weaned (himself--I nursed on demand until then) after this phase. He started sleeping all the way through the night without nursing. I also think this all happened during the time he was starting to crawl well and pull up a lot. We figured it wasn't night terrors, but instead that he was going through so much developmentally that he couldnt' turn it off at night. He sleeps very well now, although it is sometimes hard for us to get him to sleep at night.
I hope your baby is over this soon. Good luck!
S.