I've always thought that in teaching it's good to set the tone of your pace and style to your students right from the get go. Don't be afraid to push them a bit if you can. I loved that we do this during the first day and it usually creates a WTF moment for the students. I think overall everyone has a really good time and it sets the tone for the rest of the course.
Love TEFL? Who Doesn't
Also if you want to be a good ESL/EFL teacher, you are going to have to learn to be able to make a fool out of yourself at times and get rid of all your natural fears of public speaking and embarrassment. What better training for this than to scream some random sentence in a crowded public setting while amused and terrified Czechs look on.
(If you can think of something better write me)