"It's called the sephir..." Cloud starts, and then starts chewing on his pen. Then he pauses again and grows pale.

"I can't remember what it's called. It's nonsense. It's nothing."

He looks at it, holding the sides away from the wall in both his hands, staring at it as if he's just seen it for the very first time. His shoulders shake, a little like he's trying not to laugh.

"Look, it's just not anything," he says, slowly. "I'm sorry. I got away from myself a little." He swallows, and looks over his shoulder, casual again - "do you need the room for practice?"