I seen the video where someone has all three Invincble things going (turbine/fence/turret) I have tried with three friends to barracade up the vault room where pack a paunch is but for some reason the turrets once we blow them up to make them invincable they won't shoot. They just turn and aim but never shoot. Is there something else to this glitch? If I put a normal turet down it shoots just not the Permanent ones. Thanks for the help