only one thing i would suggest...move the sitting person to one of the wheels. where he is, he would be using his neck as support for sitting upright instead of his back. also, when i was in the military, if i went to sit next to a vehicle, the first spot i went to was the wheel. where he is at, is too akward for any person...obviously, its only a minute detail, but its what i would do for that much added realism