I do it too. (disassociate) T. often "makes" me "come back" by having me feel my feet on the floor, my arms on the chair, etc. He asks me if I can be here, right here, right now. These mindfulness things help me. I never told him I was "going to my happy place (not really happy mostly numb-I know the buzzing brain you mention). He just seemed to know. And sometimes this assumes i want to be present (which I don't-no way no how) then sometimes we end up sitting quietly. But if you talked to T. she might be able to help you get "back" to the session. Just my experience for what its worth.