Imagine taking off your watch to show everyone your embarrassing tan-line. You then tell them that you will try to make it less noticeable by moving it. Your spectators look at you with a questioned expression. You then put your free hand around the tan-line and proceed to move it up towards your shoulder. To everyone's amazement the tan-line on your wrist has disappeared! You move your hand up to your bicep and then let go to reveal that the tan-line is now on your bicep!