Then try using some type of distraction, while keeping the attentions of those in the audience or congregation. Here is an example from “Reader’s Digest” of September 1979:

“My son, who is a forest ranger, dislikes talking in public, but he agreed to give a talk on rattlesnakes. The day of the speech he prepared himself for the ordeal by bringing in a sack-covered box and placing it carefully at his feet on the speaker’s platform. With every eye riveted attentively and apprehensively on the box, he made his speech, and then picked up his box–which was empty–and walked out.”
–Margaret Evans