Yesterday I was in my opponents triangle, no-gi. I stood up, pulled my trapped arm up towards myself, and shook. All of a sudden, I felt my spine start to stretch, in between my shoulder blades, and I heard several loud "pops". Has anyone here experienced this? I feel an inch taller today and I was wondering how long I'm gonna have to rest this for. Any thoughts on this or what I can do to prevent it next time?