Don't know if this is true, but in Waking Life (i think) they say there's Brain activity for about 10 minutes after death. And back when they used to decapitate people, they would grab the head, and hold it up so that the eyes could look down upon their headless neck.

Even if you did this, how do you know whatever you percieved wasn't just your brain having the last 10 minute expirience of life? And the only way to do that without the brain activity, i'm guessing again, is to kill the brain as well. Is there a way to do this and still revive you?
Does the human soul even exist? And if it does, does it really matter? Separated from it's physical body, it would no longer (logically) perceive the same human-created ideals of happyness or sadness, Self, or?

Or maybe it would? GAH, I'ma go shoot myself in the head, report back later.