[dogscoff]

and then there are problems like you had in the matrix, would you realy die if you died while you were in there?
I would not be suprised if that were the case, the brain is a powerfull thing and capable of deceving even itself.

No, you wouldn't necessarily die. Do you die every time you get shot in {insert favourite fps game here} As long as you know it's just a simulation it would be no different to playing games today, just more realistic.

If someone were plugged in without knowing it was a sim, they might well be traumatised somewhat, and ppl with weak hearts etc might even get heart attacks etc, but thebrain stopping the heart becasue it "thinks you are dead" is stupid. Even the most suicidal brain wants the body to live, and the body itself will just keep on working and healing for as long as it possibly can, no matter what trauma- real or artificial- is inflicted upon it.