Question: Flip a coin
Options:
Place the coin flat on your palm.  Move your palm upward fast.  Stop the upward motion of your hand.  The coin will keep moving and spin.
Make a U shape with your index finger, place your thumb inside that U shape.  Place the coin on on your thumb nail and index finger.  Flick your thumb upward.  The coin will launch into the air.
Answer: Make a U shape with your index finger, place your thumb inside that U shape.  Place the coin on on your thumb nail and index finger.  Flick your thumb upward.  The coin will launch into the air.