There. Acknowledgement. Even a bit of sense, because Arthur's right, John shouldn't have a body. Not one of his own.

What he feels, is... Annoyance. Anger. He sets his shoulders and tips his head.

"The same way I woke up on a fucking ocean liner." he says - and an equation computes, a blank space of assumption filled, a 'therefore' resolved: "The same way you woke up here without me in your head."

He knows this isn't Arthur's world either, so it stands to reason he appeared here the same way. How long must he have wandered blindly without his help.