OH MY GOD! This is a very dumbed down version of my idea!
What is my idea you asked?
Well imagine a helmet that can read your brain waves. Where when you tell yourself to walk, it knows that your walking. Don't get it?
Well this device could be used to see what the hell people in comas are thinking. In future editions, there could be games where all you have to do is put on a helmet and close your eyes. It knows that you want to move, it knows that you want to jump at that point in time, but in reality, your not moving or jumping....your sitting, or laying.
CRAZY!