Back in the day, when I was still pretty BJJ noobish, I was training w/ the gi was attempting to stand up from the guard, when my opponent sunk in a cross choke. I decided to counter with an "Amasa Pao" choke, which usually makes the other guy let go. The problem was that I let my opponent get too big of a head start and I didn't create enough distance. Next thing I knew I was coming to, looking up at the ceiling. The guy I with whom I was training said he was scared shiitless. He said my eyes rolled to the back of my head.