[ HE REALLY DOESN'T WANT TO THINK TOO DEEPLY ABOUT.. VIBRATIONS IN HIS EAR, OR SOMETHING LIKE THAT.

But okay, he can at least kind of grasp the concept now. He looks at the sketch. ]

I see.. And you think there's something like this on the train? I don't think I've seen it before.. [ He hums, turning his attention back to the sewing. ] I guess maybe it's hidden somewhere we can't go.. Maybe over in the engine room?