You propel through space, your helmet rattling, heart pounding and arms flailing. Suddenly, a meteor zooms directly at you, out of the dark abyss. You fling your body to the left with all of your might, landing safely among the stars — at the same time you land on your couch. You're in two worlds at once. They've blended together seamlessly. You lift your hand, and a spacecraft roars to life somewhere deep within another galaxy.