Skim Serve

From SlimeWiki

The Skim Serve is a serve where the server moves forwards a fraction, the ball bounces onto the back wall at a low angle, bounces back on the top of the slime, and just clears the net.

Here's a slight variation that bounces off the net. This can be used to confuse your opponent. polone

Sometimes, if you mess up trying to serve and come up a bit short, not to worry. Here is an example of an easy recovery: