Dylan mirrors her, slamming on imaginary brakes, too, reflexively. When he relaxes, and he feels Jack's relief wash over him, he lets out a breath and dumbly, dizzy almost, declares, "You're behind a bus."

Mentally, finally he dares to reach out for Jack, his own relief adding to his. They're done now. The hard part is over. Now Jack is, like him, behind the scenes until the end.