The fear of speaking is rated as only second to the fear of snakes and before the fear of dying.
Effects of fear
What happens to many people is that--even before they start speaking--their heart starts beating faster and their mouth gets dry. Some may even get nauseous or feel like fainting.
Once the person starts talking, the heart keeps beating rapidly and the person may hear his or her voice tremble. The legs or even the whole body may start shaking. The person may also stutter or start speaking rapidly.
Although some people calm down, once they get going, others may ramble through the material incoherently.
Do you wonder why many people don't want to go through that ordeal again?