[Diarmuid watches Zack closely, all business now that he has the giggling out of his system.]

That is the most important stretch? It looks like it! What is it called?

[He thinks over the move and then frowns slightly.]

Will you do it again for me please? I want to make sure I get it right! It's not good to practice something incorrectly. I am sure it's not good to stretch incorrectly either! Isn't that right, Zack?