P.M.
My son, now 2, has been a great sleeper. However there were a couple of times when he started to wake up, but each only lasted a couple of days, and I think that was only because we really stuck to our routine and not taking him out. These were all phases, and passed pretty quickly. When he started to pull himself up, he would get up and sometimes he was still sleep. He was sort of night walking without the walking, and then my paediatrician explained to me that a lot of kids do that because of the excitement and wanting to practice. I worried that he would bump his head, but then I started teaching him how to fall. That helped a lot. In the living room, I have an ottoman, and he would use that to pull himself up and then He would let go and fall on his butt. He loved it, thought it was the funniest thing. Once he learns how to get back down, then you probably should not go in to rescue him, but until then there doesn't seem to be much choice. Maybe take your time going in there, and he'll be tired and not want to get back up. Try to teach him how to fall in the day time, and he'll connect the dots. Good luck.