All the great speakers used to mystify their audience. How can I mystify my audi

Question:

All the great speakers used to mystify their audience. How can I mystify my audience?

I am good in public speaking and generally keep my audience involved but I have never left my audience mesmerised as the great speakers do. I wish to know what can I do (apart from my homework) to influence my audience to a great extent.
No jokes. Serious answers please.

Best Answer - Chosen by Asker: First of all, start with a subject that people want to hear about. Then learn all you can about it and make the presentation interesting.