That's understandable that he wouldn't want to be a passenger with an amateur driving, afterall his father died on the track in Austria. He was from a town very close to me here in NJ.
I make a terrible passenger as well, particularly when my friend's very young girl friend from Sao Paolo is driving 100+mph with one hand on the steering wheel and looking into the rear view mirror every 5 seconds just to make eye contact with the back seat passengers she's talking to.