Japanese people are shy. So, I guess there are a lot of people
who don't like to give a speech in front of many people.
There is a way to ease the tension.
At first, you write kanji of 人 on the palm by finger.
（人 means "person " or "people" in Japanese）
And you drink it.( you pretend to drink(or eat???) the word 人)
And then your tension must be eased at the moment....
I have heard this way when I was kid. I think some of children around me
used to do this when they had a tense.
There is one more way.
Japanese people give advice, you just imagine you were at pumpkin farm and
imagine audience pumpkin.
I don't know these way are effective.^ ^ ;
I just introduced our habit.