Tim Griffiths wrote:
Jun, you got concussion from an elbow on the head once, right? Is that a one off, or have you seen any more from your dojo?
Yup -- the concussion that I got was from an elbow to the forehead. It was at a different dojo than the one I'm currently training, but I've heard one story of a concussion from someone at my current dojo (taking ukemi from ikkyo)...