too funny
I recall back in the day the crusty old ATO that turned up for my Grade 3 instructors rating test, me s%^ting bricks for a week prior.
After the chalk and talk I took him out and diligently showed him my mighty 172. Off we went, somewhere down the lane of entry he fell asleep the first time. What to do - wake him or let him snooze?
I let him go till the training area, then did the old gentle elbow.
His eyes tight shut during most of the sequences. Funny as all get out now I think about it. (and yes a snooze on the way home)
Not sure why anyone surprised at a driver (back on topic) falling asleep for a bit. Give back of the clock night freight a go - all around a day job and studies and see how long it is before you (hopefully) wake up at the wheel....