Heh... ah, Portal humor.  Is Portal the new ghostbusters?<br/><br/>And the truth is revealed!  The Sergeant is insane, the prisoners are actually Imperial Guardsmen, and the Sergeant's men are....<br/><br/>Er... what are they?  Some kind of illusion?  Chaos magic?  I'm completely out of my knowledge base here.  They can't simply be not there... they defeated ten mutants, didn't they?  Or did they?