Patrick opens his arms about three feet wide and, with one finger pointing up on each hand, tries to show the scope of this thing. I notice that he doesn’t look at his hands as he does this, but at the wall behind me. It suddenly occurs to me that when people describe size this way, they’re relying on perspective to help them. He’s not saying ‘It’s this big.’ He’s saying ‘It would look this big from here if it was over there.