I have just read about a guy who got well and truly stuck after catapulting. To read about it and see how you can avoid the same thing happening to you go onto this link http://peconicpuffin.typepad.com/the_peconic_puffin/2007/05/bad_accident_wa.html#comment-70305436
Windsurfing is a pretty safe sport - especially if you go by the standard safety procedures, but there are occasions when something happens that you would have never dreamed could happen. So its good to learn from other peoples experiences.
Another issue is right of way on the water. Wave sailing there is a standard code but on flat water no-one seems to know (unless you are sailor in the proper sense of the word and not just a surfer with no racing or sailing knowledge!) who has right of way. If one just kept to the basic starboard right of way rule then there is no question about who has right of way when two people are heading for a head on collision at great speed. When we travel abroad to go windsurfing we encounter so much of the ''I am on holiday get out of my way'' attitude - this really makes my blood boil. Simple curtesy can go so far on the water cos that extends to when you are on land as a smile and give or take on the water often leads to a pleasant conversation with the same person on the beach which then leads to making new friends and acquaintances and so on.
So....................the moral of the story? Play hard but safe, be nice and everyone can have fun!