One way or another they were going to both threat and push themselves, and at least maybe then neither could argue about the need to rest an heal once actually safe. It was, fortunately or unfortunately, in their nature. "You can remind me to at least not push to the point I might fuck my lung up again," because that was still healing. Something for Jack to focus on? Maybe.

"Yeah, that's what I was thinking. That way neither of us will worry about you falling if you do doze off, and no one will see it." That plus the helmet would make sure no one they could drive past would think the passenger was sleeping.