The backspin serve challenge

Here’s something fun for you to try. Ryan Jenkins, a Welsh international table tennis player, has set a challenge. You have to do a backspin serve which bounces once on the server’s side, once on the receiver’s side and then bounces back over the net to the server’s side again. You get five attempts. Every time you do a successful serve, Ryan will donate £1 to Pink Pong. Ryan got 3 out of 5. Will I get more?