docs: function(pos) {
              var stage = this.getStage(),
                  bufferHitCanvas = stage.bufferHitCanvas,
                  p;
  
              bufferHitCanvas.getContext().clear();
              this.drawScene(bufferHitCanvas);
              p = bufferHitCanvas.context.getImageData(Math.round(pos.x), Math.round(pos.y), 1, 1).data;
              return p[3] > 0;
          }