A prickling sensation tickles your nose, fingertips, and toes before spreading up your limbs toward your heart in a wave of warmth. At the same moment, brilliant spots fill your vision. You blink your eyes, but the spots grow brighter and coalesce into a vibrant white that you see whether your eyes are open or closed. The thrill of the sudden speed you feel compels you to reach out blindly to stop yourself, and quite suddenly all these sensations do stop as your vision clears and you stand somewhere entirely different.