I sat down with my best man and we both tried to come up with some funny stories that would be appropriate for the attendees.
In all honesty we could only come up with one, and my best man forgot it when he was standing there in front of everyone. Fortunately a friend of mine, and one of the ushers, rescued him, told the story and everything was okay.
The reason we could only come up with one was not because there weren't any funny stories....there were hundreds. None of them were appropriate for the audience though.