You are not the body/mind, therefore you cannot get up and leave the room!
But when the body/mind gets to the next room, awareness is there also. Yet it did not move.You could say the explanation is that awareness is everywhere, and that is true from the relative position of the mind, the deeper truth, however, is that everything, including the body/mind and all the rooms in the house are occurring within awareness.
Not only are they occurring within awareness, they are simultaneously perceived and projected by awareness. This is the aliveness of the present moment.