All speeches fall into one of the following categories of delivery style: The impromptu speech. Impromptu speaking may be frightening to most people because the speaker is called on without prior notice.In some cases, speakers can anticipate the request and formulate thoughts.In any case,impromptu speaking should be direct and frank. Someone not properly informed can simply say,“Thank you,.”for being called on and explain why the opportunity is being declinedAll speeches fall into one of the following categories of delivery style: The impromptu speech. Impromptu speaking may be frightening to most people because the speaker is called on without prior notice. In some cases, speakers can anticipate the request and formulate thoughts. In any case, impromptu speaking should be direct and frank. Someone not properly informed can simply say, “Thank you,” for being called on and explain why the opportunity is being declined