Vignettes must be actual cases seen by the presenter. Material is chosen that is timely and instructive for the planned audience. Presentations from other than medical services have been well received. An absolute essential for success of this format is rapid movement. Audience attention spans are short, and each sentence of each presentation must contribute.
Irrelevant data are deadly.
There is a strict time limit of five minutes for each vignette. In short, slides are to show, not to narrate. Other media such as video can be used when appropriate - e.g., gait disturbance, hemiballismus, a tic, a fit, etc. Rehearsal is essential for a program of high quality. It is the only way to obtain and keep control of the all-important timing, to delete bad slides, to prune unnecessary data, etc.