After the initial creep-out the next rather horrible feeling that came up was a severe case of 'my God, who do I work for?' on Gordon's part. Because honestly... once you've seen stuff like that, and you realize that it's been going on for a very long time... how can you not wonder just how much of that is going to be on your head?

... and then the marines start shooting at you and the world narrows down to I DO NOT WANT TO DIE and the ethical questions all go away until after the stench of the cordite is out of your nostrils and the grey-yellow-greeny ichor is off your glasses.