How not to do them:

 

Dr. Lorraine Fisher-Katz commits every public presentation blunder and PowerPoint faux-pas known to man while addressing a group of young undergraduates in Boston…before it is revealed that she is an actress hired by their professor to highlight the importance of good presentation skills. Sadly, there remain serious people in the business world who would benefit enormously from sitting through this short “workshop”.

A masterpiece in Comic Sans Serif.