Points to look for:
- The snapping of the wrist is shown by the heavy blurring of the bat, while the forearm is still in focus.
- It is clear from this angle that the player not looking at the contact of the ball.
- Note also that the bat and playing hand are moving at about 45 degrees to the horizontal.
- Contact will be made around halfway between the side and bottom of the ball due to the angle of the batface, giving a serve with good sidespin and backspin.
