There was enough fighting in the courtyard that Sinestro could easily sneak into the corridors.  Most of the guardes were too busy taking care of the scared rebels.  It didn't seem like a fight, more a one sided massacre.<br/><br/>As Sinestro made his way into the corridors, he found a few of the men crouched down, sniping down several villiagers.  They were unaware of the alien sneaking up on them.