Jim stays on the road, and practices what John taught him.
"Don't," he says, thin and strangled — no, not strangled, really. Smothered. The word hardly left his throat at all, and if John hadn't been so close, just about on top of him in an enclosed space, he might never have heard.
(For the Tumblr prompt "things you said while you were driving".)
Jim finds John. John finds trouble.
Unpleasant things happen to Jim Halsey, several times in a row but not in any particular order.