A cut to the larynx would probably cause Shelton to become mute.
Well, scratch that then. I could have sworn I read a story where something happened to alter a person's voice.
I like both of the ideas for getting the firefight, and remember there's no reason both can't happen.
On a side note, Hans was still a security guard at Pelvainda, and would probably try to use that to prove he, and therefore his friends, must be good guys. Of course this wouldn't work, but it sounds like something a staff member would logically try.
What exactly is the point of the firefight? What is James trying to accomplish? I had thought James would be trying to stop the bomb and the army was unknowignly getting in the way, but now the bomb is off. Of course, Hicks could always turn the bomb back on, re-endangering Pelvanida.