The contact point overhead smash!
The contact point is the same as the serve and is done with the racquet extended and left hand pointing to adjust to the ball. The player moves under the lob to tap the ball at the peak to show the good position under the ball.
The player from the back scratch position taps the ball to rehearse the full leverage of arm extension before they follow through. The picture to the right will help the visual learning. The follow through is the same as the serve with the racquet pronating and finishing on the left side. The example right with clearly demonstrate the form. The step are preparation, position with the body, keep your head up, contact and follow through.