the speed of the ball can depend on the size of the ball and how much it is inflated. if you have got it right for your ability the correct way to do the speed ball is to hit it, let it hit the boared in the direction you hit it so it bounces off and hits the board on the side closesed to your head,then it hits the board in front of you again, and then you hit it again. so it bounces three times in between hits. but if you have a ball that goes slowly, it is possible to do the same aproach with only one bounce, however it is easy and you dont achieve anything by doing it that way.