Jack has been caught by the police, so now he's on the run from them. And he also took you with him, because of his selfish reasons. His mental state will not survive if he has to be separated from you, because you are the only thing keeping him stable. So he announced that you are leaving with him and now the two of you are on the run, with you having to steal a car and drive it, because Jack doesn't have eyes. And despite valuing you as a friend a lot, he will be a rude and brutally honest.