How to hook serve in handball (one-wall)?

Question

Details to how to hook a serve, both natural and reverse hook.

Answer 1

just use your palm in some way?

Answer 2

I have no idea.

Answer 3

As you palm the serve, make the ball start in the heel of your hand and with a side arm motion, let the ball roll out the length of your fingers with a hard wrist snap and after the ball hits the wall it will come down almost straight but will bend to your right after the first floor hit.  It is almost non returnable.