Surface Roll
Description This trick involves rolling a coin along a surface such as a table, arm or leg with the fingers of one hand.
Start Hold out the left arm so that the forearm is parallel to the ground. Place the lower edge of a coin near the wrist held in place with the index finger on the top edge.
Directions
  1. Roll the coin roughly 100º down the arm with the index finger.
  2. Place the middle finger next to the index finger and roll the coin again.
  3. Repeat with the ring and pinkie fingers.
  4. Now reverse the moves to get back to the starting position.
Comments With an Australian 20c piece I can get the coin to roll the entire length of the forearm and back.

Make sure that the transtition from finger to finger is smooth and that the coin continues moving in a straight line. If you try and go too fast or move the coin too far with each finger the coin will tend to drift of line and then it all gets messed up. At first go slow and reduce the amount or rotation with each finger but as you get better you can get a fair bit of movement and speed.