My daughter is 5 and just started having night terrors pretty bad this summer. I asked all the mamas on here too. To me that is what your sons episodes sound like. I think it affects different kids in different ways. For her she usually starts walking around, and you don't know that she is having one right away. She looks alert, but then if you ask her what she is doing she makes no sense. So I lead her back to bed (she cannot find it on her own) and have found that it seems to be a lot milder if I agree with anything she yells out (and I have agreed to really crazy things),and just reassure her I am here, she is safe in her room. When she first started having them I tried to ask her what she was seeing, what was happening to her, hoping to figure out what was stressing her so badly, but it only made her more frantic, and she could never tell me anyway. I checked on the internet, and it says that they are causes by too much stress, and being overtired. It could be that those molars were too much stress for your little guy, or he is stressed trying to learn something new, or that since it is summer he is wearing himself out more than he was in the winter. My biggest question when my daughter was going through them so strong was that I had asked her doctor about it and he said that I needed to wake her about a half hour to and hour after she falls asleep for a week and it will break the cycle. I thought that was nuts but gave it a shot, and we have now been a week without any terrors. I realize now that the idea is to wake them before they get the terror which as you said seems to be an hour after they go to bed. She was almost like clockwork. I do like the idea of keeping a journal to help you figure out the trigger. If my daughter starts having them again, I may do that too just to see if there are any common threads, but I would also jot down what type of day she was having, weather, foods eaten, and how much naps to see if anything seems to be the same. I know weather seems crazy, but when I get migraines I did the journal to see what triggered mine, and it seemed to be they occurred just before it stormed. I doubt weather has anything to do with terrors, unless they just really stress out your little guy, but then again, we really don't know what causes them. Anyway, hope this helps a little. I know they can get pretty intense to the point I felt like someone was standing behind me sometimes.