This Halloween I didn’t go trick or treating nor did I costume up, I didn’t even give candy to children—instead, I went to check out one of my favorite DJ’s, the legendary DJ Shadow at the House of Blues on Sunset.  Always skeptical when seeing DJs perform live as their ‘stage performance’ is never truly eventful, I embarked into this show with high hopes of creativity, originality, and entertainment. To my surprise (not really), Shadow delivered on all fronts with his inventive Shadowsphere apparatus and outstanding and thought-provoking visual accompaniment courtesy of longtime VJ collaborator, Ben Stokes.  DJ Shadow, who introduced himself by walking out on stage waving to his fans following an energetic and headnodding performance by Quannum homie Pigeon John (pictures …