"Yeah and then I handed you the rockets. Never seen your mum turn that color of puce before," so he had broken through to Jamie just a little bit but it wasn't enough. The situation was wild. The look he gave Harry was questioning, wondering if he thought Teddy was totally incompetent that he wouldn't at least give them a rundown of the situation. And he didn't dignify the question with an answer.
As Harry continued on and Al eventually just broke down in hysteria, Teddy just completely shut down. Everything was packed away, put in its separate boxes, and locked in a room. Even his ability shut down - curls flattening and going his natural brown. "Scorpius will want to see you, I'm sure, Al. Maybe you'll believe him," he wanted to just walk away but he had never been the type to give up. Even if he felt like every black thought he'd ever had was pressing on him, he was part of this, one way or another.