At some stage there is good chance that your instructor will fall asleep.
A great plan of attack:
1. When instructor wakes - keep a straight face and keep looking out the front.
2. Instructor will probably wipe drool off shirt as if nothing happened - trying to stay keep and calmly ask you where do you think you are?
3. Keep straight face - calmly proclaim that you have no idea - but half an hour ago you flew over a very big airport that looked like it had big jets taking off and landing.
4. Keep straight face.