Sprinkling your presentation with some gentle humour can be useful for getting rapport with an audience.Also, it can help people to relax and to be receptive to you and your ideas.What follows are examples of one-liners for a variety of situations, which centre mainly on the business world. Some old, some new. Some borrowed, never blue! Choose the joke for the occasion, put a twinkle in your eye, get your timing right and enjoy the laughter.