I have posted a few many times about how DS1 can just change in an instant. It really upsets me and scares me too at times as I just don't understand why he does it. He doesn't seem to be able to stop when I ask why he is doing it and later, if we do discuss it, he doesn't know why he does it.
I suppose at the back of my mind I worry there is something wrong but he is absolutely fine at school.