Commentaar (Engels): "Two precision services with the exact amount of spin, speed, height and placement to pass through the holes of the wood and make the desired path. The first service does an L trajectory to reach the right corner of the table hidden by the wood. The second one makes a curve trajectory "around the net" due to the second hole isn't in straight line. The most difficult part is to synchronize the two services in time even when you cannot see the first ball behind the small wood."