Being a teacher by day, I have a few tricks up my sleeve. One show I had a guest who was yak yak yakking and no one could hear my demo. I continued the demo without talking, but had my mouth moving and hand gestures like I was on mute. With the room silent except for her, I got her attention. "That darn mute button sticks sometimes!" "Shall I rewind so we can hear what I did?" The room all laughed. I pull out the teacher card sometimes.