When you told Johnathon that the orange long form was or a sentence, notice that he grabbed the color of his shirt and began to chew on his shirt. That is a sign of stress. Had you encouraged his engagement in the material by saying, "yes, that would be superlong word, but we are actually going to use it for a sentence. His stress level may not have peeked at all. He did bounce back, but try to keep it light and encouraging. I should use this as a note to self. Thanks for sharing.