Points to look for:
- The thumb can be seen to have moved up the blade onto the rubber, since the bat is being held between the thumb and the index finger, with the other three fingers being fairly loose on the handle.
- The bat face is held at an angle, since the player wants to make the serve look similar to the other varieties of pendulum serves.
- The player has not kept track of the ball once it starts to descend. This is because this serve has been practiced often by the player, and once he knows where the ball is descending from, he does not need to see the ball to be able to make good contact.
- The free arm has continued to move out of the area between the ball and the net, so that the receiver will have a clear view of the ball throughout the service motion, as required by the rules.
