Still trying to figure that one out. As I understand it, the Matrix is basically a holodeck writ large. (Although, in a sense it's not even that - all it really is, is basically a shared dream that everyone plugged into it is having.) How can physical locations in the program have any meaning? Sure, a person in the Matrix can take all the red pills they want, but I still don't understand how this enables anyone to locate that person's real body. Or, having to exit from the Matrix by going to a phone booth - again, this is within the Matrix, so I assume that actual physical locations in the program are meaningless. Is this just a MacGuffin of sorts?