Question about the plan Adam and Gordon had

Rating: 9/10 (9 April 2005)

I suggest those who haven't seen the movie to stop reading. This post describes a possibly critical part of the movie.
When Gordon turned off the lights, and started discussing his plan with Adam, what was actually the plan? I don't think that Adam was supposed to be 'killed' by the cigarette. Instead he was supposed to pretend poorly that he was killed. I believe that the deal was something like Gordon cuts off his leg, and Adam gets shot. In that way they both survive. When the killer enters the room to free Gordon (since he has shot Adam), they would attack and kill, as it happened. The whole cigarette scene was intended to be only a distraction.
What do you think about that?