...and got DDT'ed on my head and choked out. We had a sparring/grappling session, and a seasoned member of about 5'6" and 120 lbs offered to roll with me. I am 5'11" and 170, so I figured "sure why not?" Somehow on my first day I managed to get to his back in the scramble, thought it didn't mean much because what happened next changed what I thought of this art forever. He promptly spun around to land top control, and as we both stood up with him more so in the top position, he gained a north south headlock if you will, and basically drove backwards, spiked me on my head, and choked me out within a matter of seconds. The head spike cracked my neck and left me feeling as if I'd eaten a head kick. My question, is this usually used as a weapon in BJJ? I really felt dazed afterwards, and never saw it coming at all from such a smaller foe. Please excuse me if my terminology isn't correct, it was the first time I've ever rolled.