Is this truly the unreturnable serve

https://youtu.be/dNhoWoGQ80s?si=CHWwX2Xb3fQzStIk

If someone were to do that serve

Hi Jasper,

The serve shows a ball that after bouncing on both sides has backspin and spins directly back into the net. A heavy Ghost serve.

It looks difficult to return but you will find that because the ball has so much height and travels so slowly, it will be easy for the returner to hit the ball off the bounce and hit it back effectively.