When he hears the rumbling of an engine he tries to swerve into the trees, but they're too sparse here. Which means-- fuck, what? He can keep running, try to outrun a goddamn car (not likely) or stop and take a stand (which doesn't seem much likelier to help things out, but is definitely more his style.)

Don't seem like there's much to lose, though. Which means he's about to turn and figure out how much damage he can do before he gets run down when she shouts at him.

"Well, shit."

But he clambers into the car anyway, she doesn't have to invite him twice.

He also does her the courtesy of not telling her to hurry the fuck up and go. She's a pain in the ass but she's not stupid.