When you spin the ball, you apply torque that sets it into rotational motion. The grooves on its surface create a visual spiral effect as it spins, which is why it looks so mesmerizing. The smooth, precision-machined design minimizes friction at the contact point, allowing the ball to rotate for a long time. This stability comes from rotational inertia; the tendency of a spinning object to resist changes in its motion. As the ball spins, angular momentum keeps it moving until external forces like friction and gravity gradually slow it down.