Marty doesn't really understand their situation at first, not until the first car cuts them off. He's too busy being blinded by the adrenalin rush, the fact that they're going way too fast, and there's probably cops or something on the lookout for the both of them and he doesn't have a care in the world.

He's too surprised to scream when Shin swerves, but he digs into his jacket with an iron grip. His stomach lurches, and a grip of panic grips him so tightly, he's okay with them just pulling over and getting in trouble. This was fun yeah, but he doesn't want this to end with them being buried in graves.

For a while after that incident, Marty can breathe...until the engine starts acting up.

This time he does yell when the bike clips a nearby ditch; he yells loud enough he's sure whoever's looking for them can find them by the noise he makes. Something yanks him to the side hard, enough to make him topple off of the bike and down onto the ground.

Marty feels himself rolling head over heels and acquiring a bunch of new scratches and bruises, until he finally rolls to a stop. He needs to make sure Shin's okay, but he's kind of dizzy. Really, really dizzy. "Sh-Shin?"