Colin, in the slaughterhouse scene when he's realized something is most foul, he say's "Mother of God." Listen closely. I am damn certain that's what he says, and will fight to the death anyone who disagrees. Hahaha.
Colin was close. If you watch the movie with the subtitles on you'll get what he said. In the slaughter house it was 'Now you will die.' In the ship it was 'Take it.' Other than that it was clicky-clack.