What is the Kimura? Further explanation on 'weak muscle groups' in Brazilian Jiu Jitsu.

Keith Owen talks further about the weak muscle groups of the body and how to make your attack for the kimura shoulder lock more effective. He also discusses the turtle position. This is PART 2 of WHAT IS BRAZILIAN JIU JITSU? Keith Owen is a black belt in BJJ under Professor Pedro Sauer and runs his school in Meridian Idaho. http://www.bjjmoves.com