1. Take a deep breath. Don't forget to let it out. Brew a cup of green tea while you're breathing.
2. Explain the process. He has never done this before, and he cannot read your mind.
a. Speak simply. Too many words make simple instructions confusing.
b. Speak slowly. Your calmness is contagious.
c. Demonstrate. Actions speak louder than words.
3. Repeat these steps tomorrow. And the next day.