Well, isn't this great. He'll be pretty dazed to start with, but he'll get control of the situation (as much as he can) within a few minutes. While he hadn't been carrying a gun (not a very good decision, clearly), he's always got a knife or three on him and once he maneuvers himself out of the restraints (about five minutes in), he'll be climbing over what he can (depending on the kind of vehicle) in the hopes of attacking her with the knife. This is probably not a good idea while someone is driving, but he is pissed.